diff --git a/packages/validator/src/formats.ts b/packages/validator/src/formats.ts
index ce5b3bdc17e..3b942c06322 100644
--- a/packages/validator/src/formats.ts
+++ b/packages/validator/src/formats.ts
@@ -1,7 +1,7 @@
 export default {
   url: new RegExp(
     // protocol identifier
-    '^(?:(?:(?:https?|ftp):)?//)' +
+    '^(?:(?:(?:https?|ftp|rtmp):)?//)' +
       // user:pass authentication
       '(?:\\S+(?::\\S*)?@)?' +
       '(?:' +