diff --git a/package.json b/package.json
index 4bd70c4b..088a2926 100644
--- a/package.json
+++ b/package.json
@@ -40,5 +40,5 @@
   "scripts": {
     "test": "node test/run-tests.js"
   },
-  "keywords": ["uglify", "uglify-js", "minify", "minifier"]
+  "keywords": ["uglify", "uglify-js", "minify", "minifier", "es5"]
 }