diff --git a/backend/functions/src/schema/scalars/imageUrl.ts b/backend/functions/src/schema/scalars/imageUrl.ts
index 2a5b9db..6ef7dd9 100644
--- a/backend/functions/src/schema/scalars/imageUrl.ts
+++ b/backend/functions/src/schema/scalars/imageUrl.ts
@@ -6,7 +6,7 @@ function validate(value) {
     "^(https?:\\/\\/)?" + // protocol
       "((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|" + // domain name
       "((\\d{1,3}\\.){3}\\d{1,3}))" + // OR ip (v4) address
-      "(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*" + // port and path
+      "(\\:\\d+)?(\\/[-a-z\\d%_.~+\\(\\)]*)*" + // port and path
       "(\\?[;&a-z\\d%_.~+=-]*)?" + // query string
       "(\\#[-a-z\\d_]*)?$",
     "i"