diff --git a/redash/utils/configuration.py b/redash/utils/configuration.py
index 9a550632cb..3838c33f49 100644
--- a/redash/utils/configuration.py
+++ b/redash/utils/configuration.py
@@ -27,7 +27,7 @@ def set_schema(self, schema):
         if isinstance(schema, dict):
             for prop in schema.get('properties', {}).values():
                 if 'extendedEnum' in prop:
-                    prop['enum'] = map(lambda v : v['value'], prop['extendedEnum'])
+                    prop['enum'] = map(lambda v: v['value'], prop['extendedEnum'])
                     del prop['extendedEnum']
         self._schema = schema