diff --git a/packages/modern/package.json b/packages/modern/package.json
index fbe4abb2..b47ce668 100644
--- a/packages/modern/package.json
+++ b/packages/modern/package.json
@@ -16,7 +16,6 @@
     "nodemon": "^2.0.4",
     "ts-node": "^8.10.2",
     "tslint": "^6.1.3",
-    "typescript": "^3.9.7"
-  },
-  "dependencies": {}
+    "typescript": "^4.0.5"
+  }
 }
diff --git a/packages/original/package.json b/packages/original/package.json
index e86d8996..08481e87 100644
--- a/packages/original/package.json
+++ b/packages/original/package.json
@@ -16,7 +16,6 @@
     "nodemon": "^2.0.4",
     "ts-node": "^8.10.2",
     "tslint": "^6.1.3",
-    "typescript": "^3.9.7"
-  },
-  "dependencies": {}
+    "typescript": "^4.0.5"
+  }
 }
diff --git a/packages/rainbow/package.json b/packages/rainbow/package.json
index f9296c0c..a4eaf63a 100644
--- a/packages/rainbow/package.json
+++ b/packages/rainbow/package.json
@@ -16,7 +16,6 @@
     "nodemon": "^2.0.4",
     "ts-node": "^8.10.2",
     "tslint": "^6.1.3",
-    "typescript": "^3.9.7"
-  },
-  "dependencies": {}
+    "typescript": "^4.0.5"
+  }
 }
diff --git a/yarn.lock b/yarn.lock
index bb359ac5..45ed4871 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1327,6 +1327,11 @@ typescript@^3.9.7:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
   integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
 
+typescript@^4.0.5:
+  version "4.0.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.5.tgz#ae9dddfd1069f1cb5beb3ef3b2170dd7c1332389"
+  integrity sha512-ywmr/VrTVCmNTJ6iV2LwIrfG1P+lv6luD8sUJs+2eI9NLGigaN+nUQc13iHqisq7bra9lnmUSYqbJvegraBOPQ==
+
 unbzip2-stream@^1.3.3:
   version "1.4.3"
   resolved "https://registry.yarnpkg.com/unbzip2-stream/-/unbzip2-stream-1.4.3.tgz#b0da04c4371311df771cdc215e87f2130991ace7"