diff --git a/pandora/item/migrations/0004_json_cache.py b/pandora/item/migrations/0004_json_cache.py
index 89962489..8e79c88e 100644
--- a/pandora/item/migrations/0004_json_cache.py
+++ b/pandora/item/migrations/0004_json_cache.py
@@ -19,4 +19,13 @@ class Migration(migrations.Migration):
             old_name='json',
             new_name='cache',
         ),
+        migrations.RunSQL(
+            """UPDATE item_item SET cache = jsonb_set(cache, '{created}', cache->'created'->'__value__', true) WHERE cache @> '{"created": {"__class__": "datetime.datetime"}}'"""
+        ),
+        migrations.RunSQL(
+            """UPDATE item_item SET cache = jsonb_set(cache, '{accessed}', cache->'accessed'->'__value__', true) WHERE cache @> '{"accessed": {"__class__": "datetime.datetime"}}'"""
+        ),
+        migrations.RunSQL(
+            """UPDATE item_item SET cache = jsonb_set(cache, '{modified}', cache->'modified'->'__value__', true) WHERE cache @> '{"modified": {"__class__": "datetime.datetime"}}'"""
+        ),
     ]
diff --git a/pandora/item/views.py b/pandora/item/views.py
index 41d475de..9eeba4f1 100644
--- a/pandora/item/views.py
+++ b/pandora/item/views.py
@@ -881,7 +881,7 @@ def poster(request, id, size=None):
                 poster_height=item.poster_height,
                 poster_width=item.poster_width,
                 icon=item.icon.name,
-                json=item.json()
+                cache=item.json()
             )
     if item.poster and os.path.exists(item.poster.path):
         return image_to_response(item.poster, size)
diff --git a/requirements.txt b/requirements.txt
index 4370f871..a3936b66 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,6 +7,6 @@ django-extensions==2.0.7
 gunicorn==19.8.1
 html5lib
 requests==2.19.1
-tornado==5.0.2
+tornado<5
 geoip2==2.9.0
 youtube-dl
diff --git a/update.py b/update.py
index 136f10e3..72ad1db8 100755
--- a/update.py
+++ b/update.py
@@ -247,7 +247,7 @@ if __name__ == "__main__":
             run('./bin/pip', 'install', '-r', 'requirements.txt')
             update_service('pandora-encoding')
             update_service('pandora-tasks')
-        if old < 5972:
+        if old < 5975:
             run('./bin/pip', 'install', '-r', 'requirements.txt')
     else:
         if len(sys.argv) == 1: