diff --git a/lib/utils/utils.js b/lib/utils/utils.js
index 0063c1ec..192c5507 100644
--- a/lib/utils/utils.js
+++ b/lib/utils/utils.js
@@ -148,7 +148,7 @@ function getExternalContractUrl(file) {
     // [4] path
     // [5] branch
     const match = file.match(
-      /(git:\/\/)?github\.[a-z]+\/([-a-zA-Z0-9@:%_+.~#?&=]+)\/([-a-zA-Z0-9@:%_+.~#?&=]+)\/([-a-zA-Z0-9@:%_+.~?\/&=]+)#?([a-zA-Z0-1\/_.-]*)?/
+      /(git:\/\/)?github\.[a-z]+\/([-a-zA-Z0-9@:%_+.~#?&=]+)\/([-a-zA-Z0-9@:%_+.~#?&=]+)\/([-a-zA-Z0-9@:%_+.~?\/&=]+)#?([a-zA-Z0-9\/_.-]*)?/
     );
     if (!match) {
       console.error(MALFORMED_ERROR + file);