diff --git a/cfl_common/common/migrations/0053_clean_class_data.py b/cfl_common/common/migrations/0053_clean_class_data.py
index 59200ee2d..7e025b923 100644
--- a/cfl_common/common/migrations/0053_clean_class_data.py
+++ b/cfl_common/common/migrations/0053_clean_class_data.py
@@ -6,7 +6,7 @@ def clean_dirty_data(apps: Apps, *args):
 
     Class.objects.filter(
         creation_time__year=2015
-    ).update(creation_time = null)
+    ).update(creation_time = None)
 
 class Migration(migrations.Migration):