diff --git a/package.json b/package.json
index de9761a8..09d5b1f9 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   },
   "main": "dist/index.js",
   "dependencies": {
-    "autoprefixer": "6.4.1",
+    "autoprefixer": "10.0.0",
     "chalk": "1.1.3",
     "chokidar": "1.6.1",
     "clean-css": "3.4.19",
@@ -42,7 +42,7 @@
     "json-loader": "0.5.4",
     "node-sass": "3.10.1",
     "os-name": "2.0.1",
-    "postcss": "5.2.0",
+    "postcss": "8.4.31",
     "proxy-middleware": "0.15.0",
     "rollup": "0.36.4",
     "rollup-plugin-commonjs": "5.0.5",