diff --git a/bookwyrm/settings.py b/bookwyrm/settings.py
index 2d942366..5b69e378 100644
--- a/bookwyrm/settings.py
+++ b/bookwyrm/settings.py
@@ -122,8 +122,8 @@ STREAMS = [
 # Redis cache backend
 if env("USE_DUMMY_CACHE", False):
     CACHES = {
-        'default': {
-            'BACKEND': 'django.core.cache.backends.dummy.DummyCache',
+        "default": {
+            "BACKEND": "django.core.cache.backends.dummy.DummyCache",
         }
     }
 else: