diff --git a/package.json b/package.json
index a2c3bcbe6..39dbe17bd 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "repository": "https://github.com/liqd/euth_wagtail.git",
   "dependencies": {
     "adhocracy4": "git+https://github.com/liqd/adhocracy4#014e8ef2cc586c93cdffed2631accf08cb93bc30",
-    "autoprefixer": "8.6.5",
+    "autoprefixer": "9.0.0",
     "babel-core": "6.26.3",
     "babel-loader": "7.1.5",
     "babel-preset-env": "1.7.0",