diff --git a/archivebox.egg-info/SOURCES.txt b/archivebox.egg-info/SOURCES.txt
index eee55cc5..471100ad 100644
--- a/archivebox.egg-info/SOURCES.txt
+++ b/archivebox.egg-info/SOURCES.txt
@@ -57,6 +57,7 @@ archivebox/core/migrations/0003_auto_20200630_1034.py
 archivebox/core/migrations/0004_auto_20200713_1552.py
 archivebox/core/migrations/0005_auto_20200728_0326.py
 archivebox/core/migrations/0006_auto_20201012_1520.py
+archivebox/core/migrations/0007_archiveresult.py
 archivebox/core/migrations/__init__.py
 archivebox/extractors/__init__.py
 archivebox/extractors/archive_org.py
diff --git a/archivebox.egg-info/requires.txt b/archivebox.egg-info/requires.txt
index 71dc253d..e0e17f19 100644
--- a/archivebox.egg-info/requires.txt
+++ b/archivebox.egg-info/requires.txt
@@ -2,7 +2,7 @@ requests==2.24.0
 atomicwrites==1.4.0
 mypy-extensions==0.4.3
 base32-crockford==0.3.0
-django==3.0.8
+django==3.1.3
 django-extensions==3.0.3
 dateparser
 ipython
@@ -13,7 +13,6 @@ w3lib==1.22.0
 
 [dev]
 setuptools
-wheel
 twine
 flake8
 ipdb
diff --git a/archivebox/core/migrations/0007_archiveresult.py b/archivebox/core/migrations/0007_archiveresult.py
index 4b8a074b..898e0f93 100644
--- a/archivebox/core/migrations/0007_archiveresult.py
+++ b/archivebox/core/migrations/0007_archiveresult.py
@@ -30,7 +30,7 @@ def forwards_func(apps, schema_editor):
 
         for extractor in history:
             for result in history[extractor]:
-                ArchiveResult.objects.create(extractor=extractor, snapshot=snapshot, cmd=json.dumps(result["cmd"]), cmd_version=result["cmd_version"], 
+                ArchiveResult.objects.create(extractor=extractor, snapshot=snapshot, cmd=result["cmd"], cmd_version=result["cmd_version"], 
                 start_ts=result["start_ts"], end_ts=result["end_ts"], status=result["status"], pwd=result["pwd"], output=result["output"])
 
 
@@ -76,11 +76,11 @@ class Migration(migrations.Migration):
             name='ArchiveResult',
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('cmd', models.CharField(max_length=500)),
-                ('pwd', models.CharField(max_length=200)),
+                ('cmd', models.JSONField()),
+                ('pwd', models.CharField(max_length=256)),
                 ('cmd_version', models.CharField(max_length=32)),
                 ('status', models.CharField(choices=[('succeeded', 'succeeded'), ('failed', 'failed'), ('skipped', 'skipped')], max_length=16)),
-                ('output', models.CharField(max_length=500)),
+                ('output', models.CharField(max_length=512)),
                 ('start_ts', models.DateTimeField()),
                 ('end_ts', models.DateTimeField()),
                 ('extractor', models.CharField(choices=[('title', 'title'), ('favicon', 'favicon'), ('wget', 'wget'), ('singlefile', 'singlefile'), ('pdf', 'pdf'), ('screenshot', 'screenshot'), ('dom', 'dom'), ('readability', 'readability'), ('mercury', 'mercury'), ('git', 'git'), ('media', 'media'), ('headers', 'headers'), ('archive_org', 'archive_org')], max_length=32)),
diff --git a/archivebox/core/models.py b/archivebox/core/models.py
index 48ebd43d..9d893490 100644
--- a/archivebox/core/models.py
+++ b/archivebox/core/models.py
@@ -160,7 +160,7 @@ class Snapshot(models.Model):
 
 class ArchiveResult(models.Model):
     snapshot = models.ForeignKey(Snapshot, on_delete=models.CASCADE)
-    cmd = models.CharField(max_length=500)
+    cmd = models.JSONField()
     pwd = models.CharField(max_length=256)
     cmd_version = models.CharField(max_length=32)
     output = models.CharField(max_length=512)
diff --git a/setup.py b/setup.py
index cdec8133..c540bc07 100755
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@ setuptools.setup(
         "atomicwrites==1.4.0",
         "mypy-extensions==0.4.3",
         "base32-crockford==0.3.0",
-        "django==3.0.8",
+        "django==3.1.3",
         "django-extensions==3.0.3",
 
         "dateparser",