diff --git a/lib/app.js b/lib/app.js
index cb3fa4923..76915f12f 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -257,7 +257,7 @@ function startListen () {
 models.sequelize.authenticate().then(function () {
   // check if realtime is ready
   if (realtime.isReady()) {
-    models.Revision.checkAllNotesRevision(function (err, notes) {
+    Revision.checkAllNotesRevision(function (err, notes) {
       if (err) throw new Error(err)
       if (!notes || notes.length <= 0) return startListen()
     })
diff --git a/lib/models/author.ts b/lib/models/author.ts
index 8468d3d9e..e6bd78f2a 100644
--- a/lib/models/author.ts
+++ b/lib/models/author.ts
@@ -1,43 +1,32 @@
-import {DataTypes} from 'sequelize';
+import { AutoIncrement, Table, Column, DataType, PrimaryKey, Model, BelongsTo, createIndexDecorator, ForeignKey } from 'sequelize-typescript'
+import { Note } from './note';
+import { User } from './user';
 
+const NoteUserIndex = createIndexDecorator({unique: true});
 
-function createAuthorModel(sequelize) {
-  const Author = sequelize.define('Author', {
-    id: {
-      type: DataTypes.INTEGER,
-      primaryKey: true,
-      autoIncrement: true
-    },
-    color: {
-      type: DataTypes.STRING
-    }
-  }, {
-    indexes: [
-      {
-        unique: true,
-        fields: ['noteId', 'userId']
-      }
-    ]
-  });
+@Table
+export class Author extends Model<Author> {
+  @PrimaryKey
+  @AutoIncrement
+  @Column(DataType.INTEGER)
+  id: number;
 
-  Author.associate = function (models) {
-    Author.belongsTo(models.Note, {
-      foreignKey: 'noteId',
-      as: 'note',
-      constraints: false,
-      onDelete: 'CASCADE',
-      hooks: true
-    });
-    Author.belongsTo(models.User, {
-      foreignKey: 'userId',
-      as: 'user',
-      constraints: false,
-      onDelete: 'CASCADE',
-      hooks: true
-    })
-  };
+  @Column(DataType.STRING)
+  color: string;
 
-  return Author
+  @ForeignKey(() => Note)
+  @NoteUserIndex
+  @Column
+  noteId: string;
+  
+  @BelongsTo(() => Note, { foreignKey: 'noteId', onDelete: 'CASCADE', constraints: false, hooks: true })
+  note: Note;
+
+  @ForeignKey(() => User)
+  @NoteUserIndex
+  @Column
+  userId: string;
+
+  @BelongsTo(() => User, { foreignKey: 'userId', onDelete: 'CASCADE', constraints: false, hooks: true })
+  user: User;
 }
-
-export = createAuthorModel
diff --git a/lib/models/index.js b/lib/models/index.ts
similarity index 62%
rename from lib/models/index.js
rename to lib/models/index.ts
index 88c1b1689..a2fcd7c13 100644
--- a/lib/models/index.js
+++ b/lib/models/index.ts
@@ -1,8 +1,11 @@
-'use strict'
-// external modules
+import {Sequelize} from 'sequelize-typescript';
+import { Author } from './author';
+import { Note } from './note';
+import { Revision } from './revision';
+import { Temp } from './temp';
+import { User } from './user';
 var fs = require('fs')
-var path = require('path')
-var Sequelize = require('sequelize')
+var path = require('path');
 const { cloneDeep } = require('lodash')
 
 // core
@@ -14,7 +17,7 @@ dbconfig.logging = config.debug ? (data) => {
   logger.info(data)
 } : false
 
-var sequelize = null
+var sequelize: any = null;
 
 // Heroku specific
 if (config.dbURL) {
@@ -34,26 +37,25 @@ sequelize.stripNullByte = stripNullByte
 
 function processData (data, _default, process) {
   if (data === undefined) return data
-  else return data === null ? _default : (process ? process(data) : data)
+  else if (process) {
+    if (data === null) {
+      return _default
+    } else {
+      return process(data)
+    }
+  } else {
+    if (data === null) {
+      return _default
+    } else {
+      return data
+    }
+  }
 }
 sequelize.processData = processData
 
-var db = {}
+var db: any = {}
 
-fs.readdirSync(__dirname)
-  .filter(function (file) {
-    return (file.indexOf('.') !== 0) && (file !== 'index.js')
-  })
-  .forEach(function (file) {
-    var model = sequelize.import(path.join(__dirname, file))
-    db[model.name] = model
-  })
-
-Object.keys(db).forEach(function (modelName) {
-  if ('associate' in db[modelName]) {
-    db[modelName].associate(db)
-  }
-})
+sequelize.addModels([Author, Note, Revision, Temp, User]);
 
 db.sequelize = sequelize
 db.Sequelize = Sequelize
diff --git a/lib/models/note.js b/lib/models/note.ts
similarity index 74%
rename from lib/models/note.js
rename to lib/models/note.ts
index 141402ac0..c8777b076 100644
--- a/lib/models/note.js
+++ b/lib/models/note.ts
@@ -1,4 +1,15 @@
-'use strict'
+import { AllowNull, AfterCreate, BeforeCreate, Default, Unique, IsUUID, Model, PrimaryKey, Column, DataType, Table, BelongsTo, HasMany, ForeignKey } from "sequelize-typescript";
+import { generate as shortIdGenerate, isValid as shortIdIsValid } from "shortid";
+import { Author } from "./author";
+import { User } from './user';
+import { Revision } from './revision';
+
+// external modules
+// external modules
+var fs = require('fs')
+var path = require('path')
+var LZString = require('lz-string')
+
 // external modules
 var fs = require('fs')
 var path = require('path')
@@ -7,7 +18,6 @@ var base64url = require('base64url')
 var md = require('markdown-it')()
 var metaMarked = require('meta-marked')
 var cheerio = require('cheerio')
-var shortId = require('shortid')
 var Sequelize = require('sequelize')
 var async = require('async')
 var moment = require('moment')
@@ -23,156 +33,157 @@ var logger = require('../logger')
 var ot = require('../ot')
 
 // permission types
-var permissionTypes = ['freely', 'editable', 'limited', 'locked', 'protected', 'private']
+enum PermissionEnum {
+  freely = "freely",
+  editable = "editable",
+  limited = "limited",
+  locked = "locked",
+  protected = "protected",
+  private = "private"
+};
 
-module.exports = function (sequelize, DataTypes) {
-  var Note = sequelize.define('Note', {
-    id: {
-      type: DataTypes.UUID,
-      primaryKey: true,
-      defaultValue: Sequelize.UUIDV4
-    },
-    shortid: {
-      type: DataTypes.STRING,
-      unique: true,
-      allowNull: false,
-      defaultValue: shortId.generate
-    },
-    alias: {
-      type: DataTypes.STRING,
-      unique: true
-    },
-    permission: {
-      type: DataTypes.ENUM,
-      values: permissionTypes
-    },
-    viewcount: {
-      type: DataTypes.INTEGER,
-      allowNull: false,
-      defaultValue: 0
-    },
-    title: {
-      type: DataTypes.TEXT,
-      get: function () {
-        return sequelize.processData(this.getDataValue('title'), '')
-      },
-      set: function (value) {
-        this.setDataValue('title', sequelize.stripNullByte(value))
-      }
-    },
-    content: {
-      type: DataTypes.TEXT('long'),
-      get: function () {
-        return sequelize.processData(this.getDataValue('content'), '')
-      },
-      set: function (value) {
-        this.setDataValue('content', sequelize.stripNullByte(value))
-      }
-    },
-    authorship: {
-      type: DataTypes.TEXT('long'),
-      get: function () {
-        return sequelize.processData(this.getDataValue('authorship'), [], JSON.parse)
-      },
-      set: function (value) {
-        this.setDataValue('authorship', JSON.stringify(value))
-      }
-    },
-    lastchangeAt: {
-      type: DataTypes.DATE
-    },
-    savedAt: {
-      type: DataTypes.DATE
-    }
-  }, {
-    paranoid: false,
-    hooks: {
-      beforeCreate: function (note, options) {
-        return new Promise(function (resolve, reject) {
-          // if no content specified then use default note
-          if (!note.content) {
-            var body = null
-            let filePath = null
-            if (!note.alias) {
-              filePath = config.defaultNotePath
-            } else {
-              filePath = path.join(config.docsPath, note.alias + '.md')
-            }
-            if (Note.checkFileExist(filePath)) {
-              var fsCreatedTime = moment(fs.statSync(filePath).ctime)
-              body = fs.readFileSync(filePath, 'utf8')
-              note.title = Note.parseNoteTitle(body)
-              note.content = body
-              if (filePath !== config.defaultNotePath) {
-                note.createdAt = fsCreatedTime
-              }
-            }
-          }
-          // if no permission specified and have owner then give default permission in config, else default permission is freely
-          if (!note.permission) {
-            if (note.ownerId) {
-              note.permission = config.defaultPermission
-            } else {
-              note.permission = 'freely'
-            }
-          }
-          return resolve(note)
-        })
-      },
-      afterCreate: function (note, options, callback) {
-        return new Promise(function (resolve, reject) {
-          sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
-            if (err) {
-              return reject(err)
-            }
-            return resolve(note)
-          })
-        })
-      }
-    }
-  })
+@Table({ paranoid: false })
+export class Note extends Model<Note> {
+  @PrimaryKey
+  @Default(Sequelize.UUIDV4)
+  @Column(DataType.UUID)
+  id: string;
 
-  Note.associate = function (models) {
-    Note.belongsTo(models.User, {
-      foreignKey: 'ownerId',
-      as: 'owner',
-      constraints: false,
-      onDelete: 'CASCADE',
-      hooks: true
-    })
-    Note.belongsTo(models.User, {
-      foreignKey: 'lastchangeuserId',
-      as: 'lastchangeuser',
-      constraints: false
-    })
-    Note.hasMany(models.Revision, {
-      foreignKey: 'noteId',
-      constraints: false
-    })
-    Note.hasMany(models.Author, {
-      foreignKey: 'noteId',
-      as: 'authors',
-      constraints: false
+  @AllowNull(false)
+  @Default(shortIdGenerate)
+  @Unique
+  @Column(DataType.STRING)
+  shortid: string;
+
+  @Unique
+  @Column(DataType.STRING)
+  alias: string;
+
+  @Column(DataType.ENUM({values: Object.keys(PermissionEnum).map(k => PermissionEnum[k as any])}))
+  permission: PermissionEnum;
+
+  @AllowNull(false)
+  @Default(0)
+  @Column(DataType.INTEGER)
+  viewcount: number;
+
+  @Column(DataType.TEXT)
+  get title(): string {
+    return Sequelize.processData(this.getDataValue('title'), '')
+  }
+  set title(value: string) {
+    this.setDataValue('title', Sequelize.stripNullByte(value))
+  }
+
+  @Column(DataType.TEXT({ length: 'long' }))
+  get content(): string {
+    return Sequelize.processData(this.getDataValue('content'), '')
+  }
+  set content(value: string) {
+    this.setDataValue('content', Sequelize.stripNullByte(value))
+  }
+
+  @Column(DataType.TEXT({ length: 'long' }))
+  get authorship(): string {
+    return Sequelize.processData(this.getDataValue('authorship'), [], JSON.parse)
+  }
+  set authorship(value: string) {
+    this.setDataValue('authorship', JSON.stringify(value))
+  }
+
+  // ToDo: use @UpdatedAt instead? (https://www.npmjs.com/package/sequelize-typescript#createdat--updatedat--deletedat)
+  @Column(DataType.DATE)
+  lastchangeAt: Date;
+
+  // ToDo: use @UpdatedAt instead? (https://www.npmjs.com/package/sequelize-typescript#createdat--updatedat--deletedat)
+  @Column(DataType.DATE)
+  savedAt: Date;
+
+  @ForeignKey(() => User)
+  @Column
+  ownerId: string;
+
+  @BelongsTo(() => User, { foreignKey: 'ownerId', constraints: false, onDelete: 'CASCADE', hooks: true })
+  owner: User;
+
+  @ForeignKey(() => User)
+  @Column
+  lastchangeuserId: string;
+
+  @BelongsTo(() => User, { foreignKey: 'lastchangeuserId', constraints: false })
+  lastchangeuser: User;
+
+  @HasMany(() => Revision, { foreignKey: 'noteId', constraints: false })
+  revisions: Revision[];
+
+  @HasMany(() => Author, { foreignKey: 'noteId', constraints: false })
+  authors: Author[];
+
+  @BeforeCreate
+  static defaultContentAndPermissions(note: Note) {
+    return new Promise(function (resolve, reject) {
+      // if no content specified then use default note
+      if (!note.content) {
+        let filePath = null
+        if (!note.alias) {
+          filePath = config.defaultNotePath
+        } else {
+          filePath = path.join(config.docsPath, note.alias + '.md')
+        }
+        if (Note.checkFileExist(filePath)) {
+          var fsCreatedTime = moment(fs.statSync(filePath).ctime)
+          const body = fs.readFileSync(filePath, 'utf8')
+          note.title = Note.parseNoteTitle(body)
+          note.content = body
+          if (filePath !== config.defaultNotePath) {
+            note.createdAt = fsCreatedTime
+          }
+        }
+      }
+      // if no permission specified and have owner then give default permission in config, else default permission is freely
+      if (!note.permission) {
+        if (note.owner) {
+          note.permission = config.defaultPermission
+        } else {
+          note.permission = PermissionEnum.freely
+        }
+      }
+      return resolve(note)
     })
   }
-  Note.checkFileExist = function (filePath) {
+
+  @AfterCreate
+  static saveRevision(note) {
+    return new Promise(function (resolve, reject) {
+      Sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
+        if (err) {
+          return reject(err)
+        }
+        return resolve(note)
+      })
+    })
+  }
+
+  static checkFileExist(filePath) {
     try {
       return fs.statSync(filePath).isFile()
     } catch (err) {
       return false
     }
   }
-  Note.encodeNoteId = function (id) {
+
+  static encodeNoteId(id) {
     // remove dashes in UUID and encode in url-safe base64
     let str = id.replace(/-/g, '')
     let hexStr = Buffer.from(str, 'hex')
     return base64url.encode(hexStr)
   }
-  Note.decodeNoteId = function (encodedId) {
+
+  static decodeNoteId(encodedId) {
     // decode from url-safe base64
-    let id = base64url.toBuffer(encodedId).toString('hex')
+    let id: string = base64url.toBuffer(encodedId).toString('hex')
     // add dashes between the UUID string parts
-    let idParts = []
+    let idParts: string[] = []
     idParts.push(id.substr(0, 8))
     idParts.push(id.substr(8, 4))
     idParts.push(id.substr(12, 4))
@@ -180,12 +191,12 @@ module.exports = function (sequelize, DataTypes) {
     idParts.push(id.substr(20, 12))
     return idParts.join('-')
   }
-  Note.checkNoteIdValid = function (id) {
+  static checkNoteIdValid(id) {
     var uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
     var result = id.match(uuidRegex)
     if (result && result.length === 1) { return true } else { return false }
   }
-  Note.parseNoteId = function (noteId, callback) {
+  static parseNoteId(noteId, callback) {
     async.series({
       parseNoteIdByAlias: function (_callback) {
         // try to parse note id by alias (e.g. doc)
@@ -210,7 +221,7 @@ module.exports = function (sequelize, DataTypes) {
                   content: body,
                   lastchangeAt: fsModifiedTime
                 }).then(function (note) {
-                  sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
+                  Sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
                     if (err) return _callback(err, null)
                     // update authorship on after making revision of docs
                     var patch = dmp.patch_fromText(revision.patch)
@@ -293,7 +304,7 @@ module.exports = function (sequelize, DataTypes) {
       parseNoteIdByShortId: function (_callback) {
         // try to parse note id by shortId
         try {
-          if (shortId.isValid(noteId)) {
+          if (shortIdIsValid(noteId)) {
             Note.findOne({
               where: {
                 shortid: noteId
@@ -319,7 +330,7 @@ module.exports = function (sequelize, DataTypes) {
       return callback(null, null)
     })
   }
-  Note.parseNoteInfo = function (body) {
+  parseNoteInfo(body) {
     var parsed = Note.extractMeta(body)
     var $ = cheerio.load(md.render(parsed.markdown))
     return {
@@ -327,12 +338,12 @@ module.exports = function (sequelize, DataTypes) {
       tags: Note.extractNoteTags(parsed.meta, $)
     }
   }
-  Note.parseNoteTitle = function (body) {
-    var parsed = Note.extractMeta(body)
+  static parseNoteTitle(body) {
+    const parsed = Note.extractMeta(body)
     var $ = cheerio.load(md.render(parsed.markdown))
     return Note.extractNoteTitle(parsed.meta, $)
   }
-  Note.extractNoteTitle = function (meta, $) {
+  static extractNoteTitle(meta, $) {
     var title = ''
     if (meta.title && (typeof meta.title === 'string' || typeof meta.title === 'number')) {
       title = meta.title
@@ -343,23 +354,23 @@ module.exports = function (sequelize, DataTypes) {
     if (!title) title = 'Untitled'
     return title
   }
-  Note.generateDescription = function (markdown) {
+  static generateDescription(markdown) {
     return markdown.substr(0, 100).replace(/(?:\r\n|\r|\n)/g, ' ')
   }
-  Note.decodeTitle = function (title) {
+  static decodeTitle(title) {
     return title || 'Untitled'
   }
-  Note.generateWebTitle = function (title) {
+  static generateWebTitle(title) {
     title = !title || title === 'Untitled' ? 'CodiMD - Collaborative markdown notes' : title + ' - CodiMD'
     return title
   }
-  Note.extractNoteTags = function (meta, $) {
-    var tags = []
-    var rawtags = []
+  static extractNoteTags(meta, $) {
+    var tags: string[] = []
+    var rawtags: string[] = []
     if (meta.tags && (typeof meta.tags === 'string' || typeof meta.tags === 'number')) {
       var metaTags = ('' + meta.tags).split(',')
       for (let i = 0; i < metaTags.length; i++) {
-        var text = metaTags[i].trim()
+        var text: string = metaTags[i].trim()
         if (text) rawtags.push(text)
       }
     } else {
@@ -386,22 +397,22 @@ module.exports = function (sequelize, DataTypes) {
     }
     return tags
   }
-  Note.extractMeta = function (content) {
-    var obj = null
+
+  static extractMeta(content) {
     try {
-      obj = metaMarked(content)
+      var obj = metaMarked(content)
       if (!obj.markdown) obj.markdown = ''
       if (!obj.meta) obj.meta = {}
+      return obj;
     } catch (err) {
-      obj = {
+      return {
         markdown: content,
         meta: {}
       }
     }
-    return obj
   }
-  Note.parseMeta = function (meta) {
-    var _meta = {}
+  static parseMeta(meta): NoteMetadata {
+    var _meta = new NoteMetadata();
     if (meta) {
       if (meta.title && (typeof meta.title === 'string' || typeof meta.title === 'number')) { _meta.title = meta.title }
       if (meta.description && (typeof meta.description === 'string' || typeof meta.description === 'number')) { _meta.description = meta.description }
@@ -413,15 +424,15 @@ module.exports = function (sequelize, DataTypes) {
     }
     return _meta
   }
-  Note.parseOpengraph = function (meta, title) {
-    var _ogdata = {}
+  static parseOpengraph(meta, title) {
+    var _ogdata: any = {}
     if (meta.opengraph) { _ogdata = meta.opengraph }
     if (!(_ogdata.title && (typeof _ogdata.title === 'string' || typeof _ogdata.title === 'number'))) { _ogdata.title = title }
     if (!(_ogdata.description && (typeof _ogdata.description === 'string' || typeof _ogdata.description === 'number'))) { _ogdata.description = meta.description || '' }
     if (!(_ogdata.type && (typeof _ogdata.type === 'string'))) { _ogdata.type = 'website' }
     return _ogdata
   }
-  Note.updateAuthorshipByOperation = function (operation, userId, authorships) {
+  static updateAuthorshipByOperation(operation, userId, authorships) {
     var index = 0
     var timestamp = Date.now()
     for (let i = 0; i < operation.length; i++) {
@@ -522,8 +533,8 @@ module.exports = function (sequelize, DataTypes) {
     }
     return authorships
   }
-  Note.transformPatchToOperations = function (patch, contentLength) {
-    var operations = []
+  static transformPatchToOperations(patch, contentLength) {
+    var operations: any = []
     if (patch.length > 0) {
       // calculate original content length
       for (let j = patch.length - 1; j >= 0; j--) {
@@ -544,7 +555,7 @@ module.exports = function (sequelize, DataTypes) {
       var bias = 0
       var lengthBias = 0
       for (let j = 0; j < patch.length; j++) {
-        var operation = []
+        var operation: any = []
         let p = patch[j]
         var currIndex = p.start1
         var currLength = contentLength - bias
@@ -581,6 +592,14 @@ module.exports = function (sequelize, DataTypes) {
     }
     return operations
   }
-
-  return Note
 }
+
+export class NoteMetadata {
+  title: string;
+  description: string;
+  robots: string;
+  GA: string;
+  disqus: string;
+  slideOptions: any;
+  opengraph: any;
+}
\ No newline at end of file
diff --git a/lib/models/revision.js b/lib/models/revision.ts
similarity index 65%
rename from lib/models/revision.js
rename to lib/models/revision.ts
index dbd76e4e3..dc208d839 100644
--- a/lib/models/revision.js
+++ b/lib/models/revision.ts
@@ -1,26 +1,25 @@
-'use strict'
-// external modules
+import {Table, Model, Column, DataType, BelongsTo, IsUUID, PrimaryKey, ForeignKey} from 'sequelize-typescript'
 var Sequelize = require('sequelize')
-var async = require('async')
-var moment = require('moment')
-var childProcess = require('child_process')
-var shortId = require('shortid')
-var path = require('path')
+import  async = require('async')
+import moment = require('moment')
+import childProcess = require('child_process')
+import shortId = require('shortid')
+import path = require('path')
 
 var Op = Sequelize.Op
 
 // core
-var logger = require('../logger')
+import logger = require('../logger')
+import {ChildProcess} from "child_process";
+import { Note } from './note'
 
-var dmpWorker = createDmpWorker()
+var dmpWorker : ChildProcess | null = createDmpWorker()
 var dmpCallbackCache = {}
 
 function createDmpWorker () {
-  var worker = childProcess.fork(path.resolve(__dirname, '../workers/dmpWorker.js'), {
-    stdio: 'ignore'
-  })
+  var worker = childProcess.fork(path.resolve(__dirname, '../workers/dmpWorker.js'), ['ignore'])
   logger.debug('dmp worker process started')
-  worker.on('message', function (data) {
+  worker.on('message', function (data: any) {
     if (!data || !data.msg || !data.cacheKey) {
       return logger.error('dmp worker error: not enough data on message')
     }
@@ -36,7 +35,7 @@ function createDmpWorker () {
     delete dmpCallbackCache[cacheKey]
   })
   worker.on('close', function (code) {
-    dmpWorker = null
+    dmpWorker = null;
     logger.debug(`dmp worker process exited with code ${code}`)
   })
   return worker
@@ -52,75 +51,67 @@ function sendDmpWorker (data, callback) {
   dmpWorker.send(data)
 }
 
-module.exports = function (sequelize, DataTypes) {
-  var Revision = sequelize.define('Revision', {
-    id: {
-      type: DataTypes.UUID,
-      primaryKey: true,
-      defaultValue: Sequelize.UUIDV4
-    },
-    patch: {
-      type: DataTypes.TEXT('long'),
-      get: function () {
-        return sequelize.processData(this.getDataValue('patch'), '')
-      },
-      set: function (value) {
-        this.setDataValue('patch', sequelize.stripNullByte(value))
-      }
-    },
-    lastContent: {
-      type: DataTypes.TEXT('long'),
-      get: function () {
-        return sequelize.processData(this.getDataValue('lastContent'), '')
-      },
-      set: function (value) {
-        this.setDataValue('lastContent', sequelize.stripNullByte(value))
-      }
-    },
-    content: {
-      type: DataTypes.TEXT('long'),
-      get: function () {
-        return sequelize.processData(this.getDataValue('content'), '')
-      },
-      set: function (value) {
-        this.setDataValue('content', sequelize.stripNullByte(value))
-      }
-    },
-    length: {
-      type: DataTypes.INTEGER
-    },
-    authorship: {
-      type: DataTypes.TEXT('long'),
-      get: function () {
-        return sequelize.processData(this.getDataValue('authorship'), [], JSON.parse)
-      },
-      set: function (value) {
-        this.setDataValue('authorship', value ? JSON.stringify(value) : value)
-      }
-    }
-  })
+@Table
+export class Revision extends Model<Revision> {
+  @IsUUID(4)
+  @PrimaryKey
+  @Column
+  id: string;  
 
-  Revision.associate = function (models) {
-    Revision.belongsTo(models.Note, {
-      foreignKey: 'noteId',
-      as: 'note',
-      constraints: false,
-      onDelete: 'CASCADE',
-      hooks: true
-    })
+  @Column(DataType.TEXT({ length: 'long' }))
+  get patch(): string {
+    return Sequelize.processData(this.getDataValue('patch'), '')
   }
-  Revision.getNoteRevisions = function (note, callback) {
+  set patch(value: string) {
+    this.setDataValue('patch', Sequelize.stripNullByte(value))
+  }
+
+  @Column(DataType.TEXT({ length: 'long' }))
+  get lastContent(): string {
+    return Sequelize.processData(this.getDataValue('lastContent'), '')
+  }
+  set lastContent(value: string) {
+    this.setDataValue('lastContent', Sequelize.stripNullByte(value))
+  }
+
+  @Column(DataType.TEXT({ length: 'long' }))
+  get content(): string {
+    return Sequelize.processData(this.getDataValue('content'), '')
+  }
+  set content(value: string) {
+    this.setDataValue('content', Sequelize.stripNullByte(value))
+  }
+
+  @Column(DataType.INTEGER)
+  length : number
+
+  @Column(DataType.TEXT({ length: 'long' }))
+  get authorship(): string {
+    return Sequelize.processData(this.getDataValue('authorship'), [], JSON.parse)
+  }
+  set authorship(value: string) {
+    this.setDataValue('authorship', value ? JSON.stringify(value) : value)
+  }
+
+  @ForeignKey(() => Note)
+  @Column
+  noteId: string
+
+  @BelongsTo(() => Note, { foreignKey: 'noteId', constraints: false, onDelete: 'CASCADE', hooks: true })
+  note: Note;
+
+  getNoteRevisions (note, callback) {
     Revision.findAll({
       where: {
         noteId: note.id
       },
       order: [['createdAt', 'DESC']]
     }).then(function (revisions) {
-      var data = []
-      for (var i = 0, l = revisions.length; i < l; i++) {
+      var data : any[] = []
+      for (var i = 0; i < revisions.length; i++) {
         var revision = revisions[i]
         data.push({
-          time: moment(revision.createdAt).valueOf(),
+          time : moment(revision.createdAt).valueOf(),
           length: revision.length
         })
       }
@@ -129,7 +120,7 @@ module.exports = function (sequelize, DataTypes) {
       callback(err, null)
     })
   }
-  Revision.getPatchedNoteRevisionByTime = function (note, time, callback) {
+  getPatchedNoteRevisionByTime (note, time, callback) {
     // find all revisions to prepare for all possible calculation
     Revision.findAll({
       where: {
@@ -146,7 +137,6 @@ module.exports = function (sequelize, DataTypes) {
             [Op.gte]: time
           }
         },
-        order: [['createdAt', 'DESC']]
       }).then(function (count) {
         if (count <= 0) return callback(null, null)
         sendDmpWorker({
@@ -161,18 +151,18 @@ module.exports = function (sequelize, DataTypes) {
       return callback(err, null)
     })
   }
-  Revision.checkAllNotesRevision = function (callback) {
-    Revision.saveAllNotesRevision(function (err, notes) {
+  checkAllNotesRevision (callback) {
+    this.saveAllNotesRevision(function (err, notes) {
       if (err) return callback(err, null)
       if (!notes || notes.length <= 0) {
         return callback(null, notes)
       } else {
-        Revision.checkAllNotesRevision(callback)
+        this.checkAllNotesRevision(callback)
       }
     })
   }
-  Revision.saveAllNotesRevision = function (callback) {
-    sequelize.models.Note.findAll({
+  saveAllNotesRevision (callback) {
+    Sequelize.models.Note.findAll({
       // query all notes that need to save for revision
       where: {
         [Op.and]: [
@@ -182,7 +172,7 @@ module.exports = function (sequelize, DataTypes) {
                 [Op.eq]: null,
                 [Op.and]: {
                   [Op.ne]: null,
-                  [Op.gt]: sequelize.col('createdAt')
+                  [Op.gt]: Sequelize.col('createdAt')
                 }
               }
             }
@@ -191,7 +181,7 @@ module.exports = function (sequelize, DataTypes) {
             savedAt: {
               [Op.or]: {
                 [Op.eq]: null,
-                [Op.lt]: sequelize.col('lastchangeAt')
+                [Op.lt]: Sequelize.col('lastchangeAt')
               }
             }
           }
@@ -199,24 +189,24 @@ module.exports = function (sequelize, DataTypes) {
       }
     }).then(function (notes) {
       if (notes.length <= 0) return callback(null, notes)
-      var savedNotes = []
-      async.each(notes, function (note, _callback) {
+      var savedNotes : any[] = []
+      async.each(notes, function (note : any, _callback) {
         // revision saving policy: note not been modified for 5 mins or not save for 10 mins
         if (note.lastchangeAt && note.savedAt) {
           var lastchangeAt = moment(note.lastchangeAt)
           var savedAt = moment(note.savedAt)
           if (moment().isAfter(lastchangeAt.add(5, 'minutes'))) {
             savedNotes.push(note)
-            Revision.saveNoteRevision(note, _callback)
+            this.saveNoteRevision(note, _callback)
           } else if (lastchangeAt.isAfter(savedAt.add(10, 'minutes'))) {
             savedNotes.push(note)
-            Revision.saveNoteRevision(note, _callback)
+            this.saveNoteRevision(note, _callback)
           } else {
             return _callback(null, null)
           }
         } else {
           savedNotes.push(note)
-          Revision.saveNoteRevision(note, _callback)
+          this.saveNoteRevision(note, _callback)
         }
       }, function (err) {
         if (err) {
@@ -230,7 +220,7 @@ module.exports = function (sequelize, DataTypes) {
       return callback(err, null)
     })
   }
-  Revision.saveNoteRevision = function (note, callback) {
+  saveNoteRevision (note, callback) {
     Revision.findAll({
       where: {
         noteId: note.id
@@ -239,13 +229,13 @@ module.exports = function (sequelize, DataTypes) {
     }).then(function (revisions) {
       if (revisions.length <= 0) {
         // if no revision available
-        Revision.create({
+        this.create({
           noteId: note.id,
           lastContent: note.content ? note.content : '',
           length: note.content ? note.content.length : 0,
           authorship: note.authorship
         }).then(function (revision) {
-          Revision.finishSaveNoteRevision(note, revision, callback)
+          this.finishSaveNoteRevision(note, revision, callback)
         }).catch(function (err) {
           return callback(err, null)
         })
@@ -265,12 +255,12 @@ module.exports = function (sequelize, DataTypes) {
             latestRevision.update({
               updatedAt: Date.now()
             }).then(function (revision) {
-              Revision.finishSaveNoteRevision(note, revision, callback)
+              this.finishSaveNoteRevision(note, revision, callback)
             }).catch(function (err) {
               return callback(err, null)
             })
           } else {
-            Revision.create({
+            this.create({
               noteId: note.id,
               patch: patch,
               content: note.content,
@@ -281,7 +271,7 @@ module.exports = function (sequelize, DataTypes) {
               latestRevision.update({
                 content: null
               }).then(function () {
-                Revision.finishSaveNoteRevision(note, revision, callback)
+                this.finishSaveNoteRevision(note, revision, callback)
               }).catch(function (err) {
                 return callback(err, null)
               })
@@ -295,7 +285,7 @@ module.exports = function (sequelize, DataTypes) {
       return callback(err, null)
     })
   }
-  Revision.finishSaveNoteRevision = function (note, revision, callback) {
+  finishSaveNoteRevision (note, revision, callback) {
     note.update({
       savedAt: revision.updatedAt
     }).then(function () {
@@ -305,5 +295,7 @@ module.exports = function (sequelize, DataTypes) {
     })
   }
 
-  return Revision
+
+
 }
+
diff --git a/lib/models/temp.js b/lib/models/temp.js
deleted file mode 100644
index 2ad23fb54..000000000
--- a/lib/models/temp.js
+++ /dev/null
@@ -1,18 +0,0 @@
-'use strict'
-// external modules
-var shortId = require('shortid')
-
-module.exports = function (sequelize, DataTypes) {
-  var Temp = sequelize.define('Temp', {
-    id: {
-      type: DataTypes.STRING,
-      primaryKey: true,
-      defaultValue: shortId.generate
-    },
-    data: {
-      type: DataTypes.TEXT
-    }
-  })
-
-  return Temp
-}
diff --git a/lib/models/temp.ts b/lib/models/temp.ts
new file mode 100644
index 000000000..f7c128fdb
--- /dev/null
+++ b/lib/models/temp.ts
@@ -0,0 +1,13 @@
+import { DataType, Model, Table, PrimaryKey, Column, Default } from 'sequelize-typescript'
+import { generate as shortIdGenerate, isValid as shortIdIsValid } from "shortid";
+
+@Table
+export class Temp extends Model<Temp> {
+  @Default(shortIdGenerate)
+  @PrimaryKey
+  @Column(DataType.STRING)
+  id: string;
+
+  @Column(DataType.TEXT)
+  data: string
+}
diff --git a/lib/models/user.js b/lib/models/user.ts
similarity index 51%
rename from lib/models/user.js
rename to lib/models/user.ts
index 28cbc58d8..8bb9c91ce 100644
--- a/lib/models/user.js
+++ b/lib/models/user.ts
@@ -1,97 +1,56 @@
-'use strict'
-// external modules
-const Sequelize = require('sequelize')
-const crypto = require('crypto')
-if (!crypto.scrypt) {
-  // polyfill for node.js 8.0, see https://github.com/chrisveness/scrypt-kdf#openssl-implementation
-  const scryptAsync = require('scrypt-async')
-  crypto.scrypt = function (password, salt, keylen, options, callback) {
-    const opt = Object.assign({}, options, { dkLen: keylen })
-    scryptAsync(password, salt, opt, (derivedKey) => callback(null, Buffer.from(derivedKey)))
-  }
-}
-const scrypt = require('scrypt-kdf')
+import { Note } from './note';
+import { Table, BeforeCreate, BeforeUpdate, HasMany, Unique, IsUUID, IsEmail, Column, DataType, PrimaryKey, Model, Default } from 'sequelize-typescript';
+import scrypt from 'scrypt-kdf';
+import { generateAvatarURL } from '../letter-avatars';
+import logger from '../logger';
 
+var Sequelize = require('sequelize')
 // core
-const logger = require('../logger')
-const { generateAvatarURL } = require('../letter-avatars')
 
-module.exports = function (sequelize, DataTypes) {
-  var User = sequelize.define('User', {
-    id: {
-      type: DataTypes.UUID,
-      primaryKey: true,
-      defaultValue: Sequelize.UUIDV4
-    },
-    profileid: {
-      type: DataTypes.STRING,
-      unique: true
-    },
-    profile: {
-      type: DataTypes.TEXT
-    },
-    history: {
-      type: DataTypes.TEXT
-    },
-    accessToken: {
-      type: DataTypes.TEXT
-    },
-    refreshToken: {
-      type: DataTypes.TEXT
-    },
-    deleteToken: {
-      type: DataTypes.UUID,
-      defaultValue: Sequelize.UUIDV4
-    },
-    email: {
-      type: Sequelize.TEXT,
-      validate: {
-        isEmail: true
-      }
-    },
-    password: {
-      type: Sequelize.TEXT
-    }
-  })
+@Table
+export class User extends Model<User> {
 
-  User.prototype.verifyPassword = function (attempt) {
-    return scrypt.verify(Buffer.from(this.password, 'hex'), attempt)
+  @PrimaryKey
+  @Default(Sequelize.UUIDV4)
+  @Column(DataType.UUID)
+  id: string;
+
+  @Unique
+  @Column(DataType.STRING)
+  profileid: string;
+
+  @Column(DataType.TEXT)
+  profile: string;
+
+  @Column(DataType.TEXT)
+  histroy: string;
+
+  @Column(DataType.TEXT)
+  accessToken: string;
+
+  @Column(DataType.TEXT)
+  refreshToken: string;
+
+  @IsUUID(4)
+  @Column
+  deleteToken: string;
+
+  @IsEmail
+  @Column(DataType.TEXT)
+  email: string;
+
+  @Column(DataType.TEXT)
+  password: string;
+
+  verifyPassword(attempt: string) {
+    return scrypt.verify(Buffer.from(this.password, 'hex'), attempt);
   }
 
-  User.associate = function (models) {
-    User.hasMany(models.Note, {
-      foreignKey: 'ownerId',
-      constraints: false
-    })
-    User.hasMany(models.Note, {
-      foreignKey: 'lastchangeuserId',
-      constraints: false
-    })
-  }
-  User.getProfile = function (user) {
-    if (!user) {
-      return null
-    }
-    return user.profile ? User.parseProfile(user.profile) : (user.email ? User.parseProfileByEmail(user.email) : null)
-  }
-  User.parseProfile = function (profile) {
-    try {
-      profile = JSON.parse(profile)
-    } catch (err) {
-      logger.error(err)
-      profile = null
-    }
-    if (profile) {
-      profile = {
-        name: profile.displayName || profile.username,
-        photo: User.parsePhotoByProfile(profile),
-        biggerphoto: User.parsePhotoByProfile(profile, true)
-      }
-    }
-    return profile
-  }
-  User.parsePhotoByProfile = function (profile, bigger) {
-    var photo = null
+  @HasMany(() => Note, { foreignKey: 'lastchangeuserId', constraints: false })
+  @HasMany(() => Note, { foreignKey: 'ownerId', constraints: false })
+  
+  static parsePhotoByProfile(profile: any, bigger: boolean) {
+    let photo: string;
     switch (profile.provider) {
       case 'facebook':
         photo = 'https://graph.facebook.com/' + profile.id + '/picture'
@@ -137,7 +96,7 @@ module.exports = function (sequelize, DataTypes) {
     }
     return photo
   }
-  User.parseProfileByEmail = function (email) {
+  static parseProfileByEmail(email: string) {
     return {
       name: email.substring(0, email.lastIndexOf('@')),
       photo: generateAvatarURL('', email, false),
@@ -145,21 +104,43 @@ module.exports = function (sequelize, DataTypes) {
     }
   }
 
-  function updatePasswordHashHook (user, options) {
+  @BeforeUpdate
+  @BeforeCreate
+  static async updatePasswordHashHook(user: User) {
     // suggested way to hash passwords to be able to do this asynchronously:
     // @see https://github.com/sequelize/sequelize/issues/1821#issuecomment-44265819
 
     if (!user.changed('password')) {
-      return Promise.resolve()
+      return Promise.resolve();
     }
 
-    return scrypt.kdf(user.getDataValue('password'), { logN: 15 }).then(keyBuf => {
-      user.setDataValue('password', keyBuf.toString('hex'))
+    return scrypt.kdf(user.getDataValue('password'), { logN: 15, r: 8, p: 1 }).then(keyBuf => {
+      user.setDataValue('password', keyBuf.toString('hex'));
     })
   }
 
-  User.beforeCreate(updatePasswordHashHook)
-  User.beforeUpdate(updatePasswordHashHook)
+  static getProfile(user: User) {
+    if (!user) {
+      return null
+    }
+    return user.profile ? user.parseProfile(user.profile) : (user.email ? User.parseProfileByEmail(user.email) : null)
+  }
+
+  parseProfile(profile: any) {
+    try {
+      profile = JSON.parse(profile)
+    } catch (err) {
+      logger.error(err)
+      profile = null
+    }
+    if (profile) {
+      profile = {
+        name: profile.displayName || profile.username,
+        photo: User.parsePhotoByProfile(profile, false),
+        biggerphoto: User.parsePhotoByProfile(profile, true)
+      }
+    }
+    return profile
+  }
 
-  return User
 }
diff --git a/lib/web/note/actions.js b/lib/web/note/actions.js
deleted file mode 100644
index d92d2443e..000000000
--- a/lib/web/note/actions.js
+++ /dev/null
@@ -1,89 +0,0 @@
-const models = require('../../models')
-const logger = require('../../logger')
-const config = require('../../config')
-const errors = require('../../errors')
-const shortId = require('shortid')
-const moment = require('moment')
-const querystring = require('querystring')
-
-exports.getInfo = function getInfo (req, res, note) {
-  const body = note.content
-  const extracted = models.Note.extractMeta(body)
-  const markdown = extracted.markdown
-  const meta = models.Note.parseMeta(extracted.meta)
-  const createtime = note.createdAt
-  const updatetime = note.lastchangeAt
-  const title = models.Note.decodeTitle(note.title)
-  const data = {
-    title: meta.title || title,
-    description: meta.description || (markdown ? models.Note.generateDescription(markdown) : null),
-    viewcount: note.viewcount,
-    createtime: createtime,
-    updatetime: updatetime
-  }
-  res.set({
-    'Access-Control-Allow-Origin': '*', // allow CORS as API
-    'Access-Control-Allow-Headers': 'Range',
-    'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
-    'Cache-Control': 'private', // only cache by client
-    'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
-  })
-  res.send(data)
-}
-
-exports.createGist = function createGist (req, res, note) {
-  const data = {
-    client_id: config.github.clientID,
-    redirect_uri: config.serverURL + '/auth/github/callback/' + models.Note.encodeNoteId(note.id) + '/gist',
-    scope: 'gist',
-    state: shortId.generate()
-  }
-  const query = querystring.stringify(data)
-  res.redirect('https://github.com/login/oauth/authorize?' + query)
-}
-
-exports.getRevision = function getRevision (req, res, note) {
-  const actionId = req.params.actionId
-  if (actionId) {
-    const time = moment(parseInt(actionId))
-    if (time.isValid()) {
-      models.Revision.getPatchedNoteRevisionByTime(note, time, function (err, content) {
-        if (err) {
-          logger.error(err)
-          return errors.errorInternalError(res)
-        }
-        if (!content) {
-          return errors.errorNotFound(res)
-        }
-        res.set({
-          'Access-Control-Allow-Origin': '*', // allow CORS as API
-          'Access-Control-Allow-Headers': 'Range',
-          'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
-          'Cache-Control': 'private', // only cache by client
-          'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
-        })
-        res.send(content)
-      })
-    } else {
-      return errors.errorNotFound(res)
-    }
-  } else {
-    models.Revision.getNoteRevisions(note, function (err, data) {
-      if (err) {
-        logger.error(err)
-        return errors.errorInternalError(res)
-      }
-      const out = {
-        revision: data
-      }
-      res.set({
-        'Access-Control-Allow-Origin': '*', // allow CORS as API
-        'Access-Control-Allow-Headers': 'Range',
-        'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
-        'Cache-Control': 'private', // only cache by client
-        'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
-      })
-      res.send(out)
-    })
-  }
-}
diff --git a/lib/web/note/actions.ts b/lib/web/note/actions.ts
new file mode 100644
index 000000000..ac52f1fac
--- /dev/null
+++ b/lib/web/note/actions.ts
@@ -0,0 +1,97 @@
+import {Response} from "express";
+
+const models = require('../../models')
+const logger = require('../../logger')
+const config = require('../../config')
+const errors = require('../../errors')
+const shortId = require('shortid')
+const moment = require('moment')
+const querystring = require('querystring')
+
+export module ActionController {
+
+  // TODO: Use correct type for note
+  export function getInfo(req: any, res: Response, note: any) {
+    const body = note.content
+    const extracted = models.Note.extractMeta(body)
+    const markdown = extracted.markdown
+    const meta = models.Note.parseMeta(extracted.meta)
+    const createtime = note.createdAt
+    const updatetime = note.lastchangeAt
+    const title = models.Note.decodeTitle(note.title)
+    const data = {
+      title: meta.title || title,
+      description: meta.description || (markdown ? models.Note.generateDescription(markdown) : null),
+      viewcount: note.viewcount,
+      createtime: createtime,
+      updatetime: updatetime
+    }
+    res.set({
+      'Access-Control-Allow-Origin': '*', // allow CORS as API
+      'Access-Control-Allow-Headers': 'Range',
+      'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
+      'Cache-Control': 'private', // only cache by client
+      'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
+    })
+    res.send(data)
+  }
+
+  // TODO: Use correct type for note
+  export function createGist(req: any, res: Response, note: any) {
+    const data = {
+      client_id: config.github.clientID,
+      redirect_uri: config.serverURL + '/auth/github/callback/' + models.Note.encodeNoteId(note.id) + '/gist',
+      scope: 'gist',
+      state: shortId.generate()
+    }
+    const query = querystring.stringify(data)
+    res.redirect('https://github.com/login/oauth/authorize?' + query)
+  }
+
+  // TODO: Use correct type for note
+  export function getRevision(req: any, res: Response, note: any) {
+    const actionId = req.params.actionId
+    if (actionId) {
+      const time = moment(parseInt(actionId))
+      if (time.isValid()) {
+        models.Revision.getPatchedNoteRevisionByTime(note, time, function (err, content) {
+          if (err) {
+            logger.error(err)
+            return errors.errorInternalError(res)
+          }
+          if (!content) {
+            return errors.errorNotFound(res)
+          }
+          res.set({
+            'Access-Control-Allow-Origin': '*', // allow CORS as API
+            'Access-Control-Allow-Headers': 'Range',
+            'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
+            'Cache-Control': 'private', // only cache by client
+            'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
+          })
+          res.send(content)
+        })
+      } else {
+        return errors.errorNotFound(res)
+      }
+    } else {
+      models.Revision.getNoteRevisions(note, function (err, data) {
+        if (err) {
+          logger.error(err)
+          return errors.errorInternalError(res)
+        }
+        const out = {
+          revision: data
+        }
+        res.set({
+          'Access-Control-Allow-Origin': '*', // allow CORS as API
+          'Access-Control-Allow-Headers': 'Range',
+          'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
+          'Cache-Control': 'private', // only cache by client
+          'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
+        })
+        res.send(out)
+      })
+    }
+  }
+}
diff --git a/package.json b/package.json
index 2f07f1044..54e5d4ef2 100644
--- a/package.json
+++ b/package.json
@@ -107,6 +107,7 @@
     "randomcolor": "^0.5.3",
     "raphael": "git+https://github.com/dmitrybaranovskiy/raphael",
     "readline-sync": "^1.4.7",
+    "reflect-metadata": "^0.1.13",
     "request": "^2.88.0",
     "reveal.js": "~3.9.2",
     "scrypt-async": "^2.0.1",
@@ -167,8 +168,11 @@
     "url": "https://github.com/codimd/server.git"
   },
   "devDependencies": {
-    "@types/express": "4.17.0",
-    "@types/node": "^12.12.12",
+    "@types/express": "^4.17.6",
+    "@types/node": "^13.11.1",
+    "@types/bluebird": "^3.5.30",
+    "@types/passport": "^1.0.3",
+    "@types/validator": "^13.0.0",
     "awesome-typescript-loader": "^5.2.1",
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.3",
diff --git a/tsconfig.json b/tsconfig.json
index b750d83da..6d88a11ee 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,7 +6,8 @@
     "target": "es5",
     "module": "commonjs",
     "esModuleInterop": true,
-    "experimentalDecorators": true
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true
   },
   "include": [
     "./lib/**/*"
diff --git a/yarn.lock b/yarn.lock
index ca05714c8..d700532fb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -64,6 +64,11 @@
   resolved "https://registry.yarnpkg.com/@passport-next/passport-strategy/-/passport-strategy-1.1.0.tgz#4c0df069e2ec9262791b9ef1e23320c1d73bdb74"
   integrity sha512-2KhFjtPueJG6xVj2HnqXt9BlANOfYCVLyu+pXYjPGBDT8yk+vQwc/6tsceIj+mayKcoxMau2JimggXRPHgoc8w==
 
+"@types/bluebird@^3.5.30":
+  version "3.5.30"
+  resolved "https://registry.yarnpkg.com/@types/bluebird/-/bluebird-3.5.30.tgz#ee034a0eeea8b84ed868b1aa60d690b08a6cfbc5"
+  integrity sha512-8LhzvcjIoqoi1TghEkRMkbbmM+jhHnBokPGkJWjclMK+Ks0MxEBow3/p2/iFTZ+OIbJHQDSfpgdZEb+af3gfVw==
+
 "@types/body-parser@*":
   version "1.19.0"
   resolved "https://registry.yarnpkg.com/@types/body-parser/-/body-parser-1.19.0.tgz#0685b3c47eb3006ffed117cdd55164b61f80538f"
@@ -85,9 +90,9 @@
   integrity sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw==
 
 "@types/express-serve-static-core@*":
-  version "4.17.2"
-  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.17.2.tgz#f6f41fa35d42e79dbf6610eccbb2637e6008a0cf"
-  integrity sha512-El9yMpctM6tORDAiBwZVLMcxoTMcqqRO9dVyYcn7ycLWbvR8klrDn8CAOwRfZujZtWD7yS/mshTdz43jMOejbg==
+  version "4.17.4"
+  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.17.4.tgz#157c79c2d28b632d6418497c57c93185e392e444"
+  integrity sha512-dPs6CaRWxsfHbYDVU51VjEJaUJEcli4UI0fFMT4oWmgCvHj+j7oIxz5MLHVL0Rv++N004c21ylJNdWQvPkkb5w==
   dependencies:
     "@types/node" "*"
     "@types/range-parser" "*"
@@ -101,13 +106,14 @@
     "@types/express-serve-static-core" "*"
     "@types/serve-static" "*"
 
-"@types/express@4.17.0":
-  version "4.17.0"
-  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.0.tgz#49eaedb209582a86f12ed9b725160f12d04ef287"
-  integrity sha512-CjaMu57cjgjuZbh9DpkloeGxV45CnMGlVd+XpG7Gm9QgVrd7KFq+X4HY0vM+2v0bczS48Wg7bvnMY5TN+Xmcfw==
+"@types/express@^4.17.6":
+  version "4.17.6"
+  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.6.tgz#6bce49e49570507b86ea1b07b806f04697fac45e"
+  integrity sha512-n/mr9tZI83kd4azlPG5y997C/M4DNABK9yErhFM6hKdym4kkmd9j0vtsJyjFIwfRBxtrxZtAfGZCNRIBMFLK5w==
   dependencies:
     "@types/body-parser" "*"
     "@types/express-serve-static-core" "*"
+    "@types/qs" "*"
     "@types/serve-static" "*"
 
 "@types/geojson@^7946.0.7":
@@ -127,7 +133,12 @@
   resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.1.tgz#dc488842312a7f075149312905b5e3c0b054c79d"
   integrity sha512-FwI9gX75FgVBJ7ywgnq/P7tw+/o1GUbtP0KzbtusLigAOgIgNISRK0ZPl4qertvXSIE8YbsVJueQ90cDt9YYyw==
 
-"@types/node@*", "@types/node@>=8.0.0":
+"@types/node@*", "@types/node@^13.11.1":
+  version "13.11.1"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.11.1.tgz#49a2a83df9d26daacead30d0ccc8762b128d53c7"
+  integrity sha512-eWQGP3qtxwL8FGneRrC5DwrJLGN4/dH1clNTuLfN81HCrxVtxRjygDTUoZJ5ASlDEeo0ppYFQjQIlXhtXpOn6g==
+
+"@types/node@>=8.0.0":
   version "13.7.1"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-13.7.1.tgz#238eb34a66431b71d2aaddeaa7db166f25971a0d"
   integrity sha512-Zq8gcQGmn4txQEJeiXo/KiLpon8TzAl0kmKH4zdWctPj05nWwp1ClMdAVEloqrQKfaC48PNLdgN/aVaLqUrluA==
@@ -137,11 +148,6 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.17.15.tgz#bfff4e23e9e70be6eec450419d51e18de1daf8e7"
   integrity sha512-daFGV9GSs6USfPgxceDA8nlSe48XrVCJfDeYm7eokxq/ye7iuOH87hKXgMtEAVLFapkczbZsx868PMDT1Y0a6A==
 
-"@types/node@^12.12.12":
-  version "12.12.28"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.12.28.tgz#3a2b5f8d21f96ace690a8832ae9779114612575f"
-  integrity sha512-g73GJYJDXgf0jqg+P9S8h2acWbDXNkoCX8DLtJVu7Fkn788pzQ/oJsrdJz/2JejRf/SjfZaAhsw+3nd1D5EWGg==
-
 "@types/node@^12.12.17":
   version "12.12.27"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-12.12.27.tgz#d7506f73160ad30fcebbcf5b8b7d2d976e649e42"
@@ -159,11 +165,23 @@
   dependencies:
     "@types/express" "*"
 
+"@types/passport@^1.0.3":
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/@types/passport/-/passport-1.0.3.tgz#e459ed6c262bf0686684d1b05901be0d0b192a9c"
+  integrity sha512-nyztuxtDPQv9utCzU0qW7Gl8BY2Dn8BKlYAFFyxKipFxjaVd96celbkLCV/tRqqBUZ+JB8If3UfgV8347DTo3Q==
+  dependencies:
+    "@types/express" "*"
+
 "@types/q@^1.5.1":
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/@types/q/-/q-1.5.2.tgz#690a1475b84f2a884fd07cd797c00f5f31356ea8"
   integrity sha512-ce5d3q03Ex0sy4R14722Rmt6MT07Ua+k4FwDfdcToYJcMKNtRVQvJ6JCAPdAmAnbRb6CsX6aYb9m96NGod9uTw==
 
+"@types/qs@*":
+  version "6.9.1"
+  resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.1.tgz#937fab3194766256ee09fcd40b781740758617e7"
+  integrity sha512-lhbQXx9HKZAPgBkISrBcmAcMpZsmpe/Cd/hY7LGZS5OfkySUBItnPZHgQPssWYUET8elF+yCFBbP1Q0RZPTdaw==
+
 "@types/range-parser@*":
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/@types/range-parser/-/range-parser-1.2.3.tgz#7ee330ba7caafb98090bece86a5ee44115904c2c"
@@ -192,6 +210,11 @@
   dependencies:
     "@types/node" "*"
 
+"@types/validator@^13.0.0":
+  version "13.0.0"
+  resolved "https://registry.yarnpkg.com/@types/validator/-/validator-13.0.0.tgz#365f1bf936aeaddd0856fc41aa1d6f82d88ee5b3"
+  integrity sha512-WAy5txG7aFX8Vw3sloEKp5p/t/Xt8jD3GRD9DacnFv6Vo8ubudAsRTXgxpQwU0mpzY/H8U4db3roDuCMjShBmw==
+
 "@webassemblyjs/ast@1.8.5":
   version "1.8.5"
   resolved "https://registry.yarnpkg.com/@webassemblyjs/ast/-/ast-1.8.5.tgz#51b1c5fe6576a34953bf4b253df9f0d490d9e359"
@@ -8343,6 +8366,11 @@ referrer-policy@1.2.0:
   resolved "https://registry.yarnpkg.com/referrer-policy/-/referrer-policy-1.2.0.tgz#b99cfb8b57090dc454895ef897a4cc35ef67a98e"
   integrity sha512-LgQJIuS6nAy1Jd88DCQRemyE3mS+ispwlqMk3b0yjZ257fI1v9c+/p6SD5gP5FGyXUIgrNOAfmyioHwZtYv2VA==
 
+reflect-metadata@^0.1.13:
+  version "0.1.13"
+  resolved "https://registry.yarnpkg.com/reflect-metadata/-/reflect-metadata-0.1.13.tgz#67ae3ca57c972a2aa1642b10fe363fe32d49dc08"
+  integrity sha512-Ts1Y/anZELhSsjMcU605fU9RE4Oi3p5ORujwbIKXfWa+0Zxs510Qrmrce5/Jowq3cHSZSJqBjypxmHarc+vEWg==
+
 regenerate-unicode-properties@^8.1.0:
   version "8.1.0"
   resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-8.1.0.tgz#ef51e0f0ea4ad424b77bf7cb41f3e015c70a3f0e"
@@ -8868,6 +8896,13 @@ sequelize-pool@^2.3.0:
   resolved "https://registry.yarnpkg.com/sequelize-pool/-/sequelize-pool-2.3.0.tgz#64f1fe8744228172c474f530604b6133be64993d"
   integrity sha512-Ibz08vnXvkZ8LJTiUOxRcj1Ckdn7qafNZ2t59jYHMX1VIebTAOYefWdRYFt6z6+hy52WGthAHAoLc9hvk3onqA==
 
+sequelize-typescript@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/sequelize-typescript/-/sequelize-typescript-1.1.0.tgz#d5c2945e7fbfe55a934917b27d84589858d79123"
+  integrity sha512-FAPEQPeAhIaFQNLAcf9Q2IWcqWhNcvn5OZZ7BzGB0CJMtImIsGg4E/EAb7huMmPaPwDArxJUWGqk1KurphTNRA==
+  dependencies:
+    glob "7.1.2"
+
 sequelize@^5.21.1:
   version "5.21.4"
   resolved "https://registry.yarnpkg.com/sequelize/-/sequelize-5.21.4.tgz#a49597dbd7862e4e1fb8ec819de04705d06d9d17"