diff --git a/webpack.aot.js b/webpack.aot.js
index 2387968a71f12e52d4752e116bc760f0f7c723b4..0b8ac221109bc3d7a1868e4779576f6190b71b1c 100644
--- a/webpack.aot.js
+++ b/webpack.aot.js
@@ -34,7 +34,7 @@ module.exports = merge(staticAssets, {
       },
       {
         test : /\.(html|css)$/,
-        exclude : /export\_nehuba|index|res\/css|plugin_example/,
+        exclude : /export\_nehuba|index|res\/css|plugin_example|material\/prebuilt-themes/,
         use : {
           loader : 'raw-loader',
         }