diff --git a/server/books/schema/mutations/contentblock.py b/server/books/schema/mutations/contentblock.py
index 7d30d5bf..0d0b371e 100644
--- a/server/books/schema/mutations/contentblock.py
+++ b/server/books/schema/mutations/contentblock.py
@@ -59,7 +59,7 @@ class MutateContentBlock(relay.ClientIDMutation):
             raise errors
         except Exception as e:
             errors = ['Error: {}'.format(e)]
-            raise errors
+            raise Exception(errors)
 
 
 class AddContentBlock(relay.ClientIDMutation):