diff --git a/Makefile b/Makefile
index d6742d2187..1c062ec7ab 100644
--- a/Makefile
+++ b/Makefile
@@ -308,4 +308,5 @@ package:
 	@cp -r package build
 	@cd ./src && cp -r ol/* ../build/package
 	@rm build/package/typedefs.js
+	@cp css/ol.css build/package
 	./node_modules/.bin/jscodeshift --transform transforms/module.js build/package
diff --git a/package/package.json b/package/package.json
index f57322f489..2db87822f2 100644
--- a/package/package.json
+++ b/package/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol",
-  "version": "4.0.1-beta.1",
+  "version": "4.0.1-beta.2",
   "description": "OpenLayers as ES2015 modules",
   "main": "index.js",
   "module": "index.js",
@@ -10,5 +10,15 @@
     "pixelworks": "1.1.0",
     "rbush": "2.0.1",
     "vector-tile": "1.3.0"
+  },
+  "browserify": {
+    "transform": [
+      [
+        "babelify",
+        {
+          "plugins": ["transform-es2015-modules-commonjs"]
+        }
+      ]
+    ]
   }
 }