diff --git a/package.json b/package.json
index ae4079f..84be213 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "gulp-terser": "1.4.0",
     "gulp-optimize-js": "1.1.0",
     "gulp-sass": "4.1.0",
-    "gulp-postcss": "8.0.0",
+    "gulp-postcss": "9.0.0",
     "cssnano": "4.1.10",
     "autoprefixer": "9.8.6",
     "node-sass-tilde-importer": "^1.0.2"