diff --git a/index.js b/index.js
index bdbe44f..d369223 100644
--- a/index.js
+++ b/index.js
@@ -23,6 +23,9 @@ PolyfillsPlugin.prototype.apply = function(compiler) {
             chunks.forEach(function(chunk) {
                 if(!chunk.initial) return;
                 chunk.files.forEach(function(file, i) {
+                    if (!file.endsWith('.js')) {
+                        return;
+                    }
                     compilation.assets[file] = new ConcatSource("/* Polyfills */\n", filesContent, compilation.assets[file]);
                 });
             });
diff --git a/package.json b/package.json
index 04cd410..0c471b6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "webpack-polyfills-plugin",
-  "version": "0.0.9",
+  "version": "0.0.10",
   "description": "Adds polyfills to bundle file, without magic.",
   "main": "index.js",
   "scripts": {