Fixed extract-text-webpack-plugin version

Change-Id: If0e7386256d73e404f2a574031d449a76c93456b
diff --git a/package.json b/package.json
index e119053..28ebefb 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "eslint-loader": "^1.3.0",
     "eslint-plugin-angular": "^1.3.0",
     "eslint-plugin-babel": "^3.1.0",
-    "extract-text-webpack-plugin": "^2.0.0-beta.3",
+    "extract-text-webpack-plugin": "2.0.0-beta.3",
     "file-loader": "^0.9.0",
     "gulp": "gulpjs/gulp#4ed9a4a3275559c73a396eff7e1fde3824951ebb",
     "gulp-angular-filesort": "^1.1.1",