diff --git a/package.json b/package.json
index bc7debdf..1fd46925 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "gulp-inline-source": "^2.1.0",
     "gulp-load-plugins": "^1.0.0-rc.1",
     "gulp-minify-html": "^1.0.4",
-    "gulp-postcss": "^6.0.1",
+    "gulp-postcss": "^9.0.0",
     "gulp-replace": "^0.5.4",
     "gulp-sourcemaps": "^1.6.0",
     "gulp-uglify": "^1.4.2",
@@ -44,10 +44,10 @@
     "node-fetch": "^1.3.3",
     "oghliner": "^1.0.0",
     "postcss-cssnext": "^2.3.0",
-    "postcss-import": "^8.0.1",
-    "postcss-nested": "^1.0.0",
+    "postcss-import": "^13.0.0",
+    "postcss-nested": "^5.0.0",
     "postcss-simple-extend": "^1.0.0",
-    "postcss-simple-vars": "^1.0.1",
+    "postcss-simple-vars": "^6.0.0",
     "slug": "^0.9.1",
     "source-map-support": "^0.4.0",
     "vinyl-buffer": "^1.0.0",