diff --git a/redash/query_runner/mongodb.py b/redash/query_runner/mongodb.py
index b83ac16080..b49cf9e89c 100644
--- a/redash/query_runner/mongodb.py
+++ b/redash/query_runner/mongodb.py
@@ -82,7 +82,7 @@ def configuration_schema(cls):
                     'title': 'Replica Set Name'
                 },
             },
-            'required': ['connectionString']
+            'required': ['connectionString', 'dbName']
         }
 
     @classmethod