diff --git a/bucket/mongodb.json b/bucket/mongodb.json
index 6222565913410..5edbea902620a 100644
--- a/bucket/mongodb.json
+++ b/bucket/mongodb.json
@@ -59,7 +59,8 @@
             }
         },
         "hash": {
-            "url": "$url.sha256"
+            "url": "$url.sha256",
+            "regex": "$sha256"
         }
     }
 }