diff --git a/package.json b/package.json
index 7c98e99..026190a 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "homepage": "git+https://github.com/lightspeeddevelopment/lsx-customizer",
   "devDependencies": {
     "gulp": "4.0.2",
-    "gulp-autoprefixer": "8.0.0",
+    "gulp-autoprefixer": "9.0.0",
     "gulp-concat": "2.6.1",
     "gulp-gettext": "0.3.0",
     "gulp-jshint": "2.1.0",