diff --git a/package.json b/package.json
index 8893c88..4b13451 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "devDependencies": {
     "gulp": "^4.0.2",
     "gulp-rtlcss": "^2.0.0",
-    "gulp-autoprefixer": "^8.0.0",
+    "gulp-autoprefixer": "^9.0.0",
     "gulp-concat": "^2.6.1",
     "gulp-gettext": "^0.3.0",
     "gulp-jshint": "^2.0.4",