diff --git a/package.json b/package.json
index bfc1a87f..b8a59cdf 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
   "main": "dist/index.js",
   "dependencies": {
     "@angular-devkit/build-optimizer": "0.0.35",
-    "autoprefixer": "^7.2.6",
+    "autoprefixer": "^10.0.0",
     "chalk": "^2.4.0",
     "chokidar": "^3.5.2",
     "clean-css": "^4.1.11",
@@ -51,7 +51,7 @@
     "json-loader": "^0.5.7",
     "node-sass": "^6.0.1",
     "os-name": "^2.0.1",
-    "postcss": "^6.0.21",
+    "postcss": "^8.4.31",
     "proxy-middleware": "^0.15.0",
     "reflect-metadata": "^0.1.10",
     "rollup": "0.50.0",