diff --git a/package.json b/package.json
index 725023c..757a9c0 100644
--- a/package.json
+++ b/package.json
@@ -32,8 +32,8 @@
   "dependencies": {
     "autoprefixer": "^6.7.7",
     "loader-utils": "^1.1.0",
-    "node-sass": "^4.5.2",
-    "postcss": "^5.2.17",
+    "node-sass": "^9.0.0",
+    "postcss": "^8.4.38",
     "riot-compiler": "^3.2.1"
   },
   "peerDependencies": {