diff --git a/packages/gatsby-plugin-postcss-sass/package.json b/packages/gatsby-plugin-postcss-sass/package.json
index b328f2193c6df..e239ca87c9815 100644
--- a/packages/gatsby-plugin-postcss-sass/package.json
+++ b/packages/gatsby-plugin-postcss-sass/package.json
@@ -8,10 +8,10 @@
   },
   "dependencies": {
     "babel-runtime": "^6.26.0",
-    "extract-text-webpack-plugin": "^1.0.1",
+    "extract-text-webpack-plugin": "^2.0.0",
     "gatsby-1-config-css-modules": "^1.0.11",
     "node-sass": "^4.5.2",
-    "sass-loader": "^4.1.1"
+    "sass-loader": "^6.0.2"
   },
   "devDependencies": {
     "babel-cli": "^6.26.0",