diff --git a/app/Gruntfile.js b/app/Gruntfile.js
index <HASH>..<HASH> 100644
--- a/app/Gruntfile.js
+++ b/app/Gruntfile.js
@@ -124,7 +124,7 @@ module.exports = function (grunt) {
                 },
                 src: [
                     '<%= config.node %>/promise-polyfill/dist/polyfill.min.js',
-                    '<%= config.node %>/whatwg-fetch/fetch.js'
+                    '<%= config.node %>/whatwg-fetch/dist/fetch.umd.js'
                 ],
                 dest: '<%= config.public %>/js/polyfill.min.js'
             },
JBEAP-<I>: Use 'fetch.umd.js' as polyfill