diff --git a/openslides/config/models.py b/openslides/config/models.py
index be59d61ad..be2fe99b7 100644
--- a/openslides/config/models.py
+++ b/openslides/config/models.py
@@ -58,7 +58,7 @@ class Config(object):
             ## pass
 
         try:
-            return loads(base64(ConfigStore.objects.get(key=key).value))
+            return loads(base64(str(ConfigStore.objects.get(key=key).value)))
         except ConfigStore.DoesNotExist:
             pass