diff --git a/Gruntfile.js b/Gruntfile.js
index c71fe02612..2397b11fa4 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -967,6 +967,7 @@ module.exports = function(grunt) {
 					src: [
 						WORKING_DIR + 'wp-{admin,includes}/**/*.js',
 						WORKING_DIR + 'wp-content/themes/twenty*/**/*.js',
+						'!' + WORKING_DIR + 'wp-content/themes/twenty*/node_modules/**/*.js',
 						'!' + WORKING_DIR + 'wp-includes/js/dist/vendor/*.js',
 					]
 				}