diff --git a/package.json b/package.json
index 04a88f3..317f193 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "mocha": "^2.3.0",
     "node-libs-browser": ">= 0.4.0 <=0.6.0",
     "object-assign": "^4.0.1",
-    "postcss": "^5.0.11",
+    "postcss": "^8.0.0",
     "postcss-modules-extract-imports": "^1.0.0",
     "postcss-modules-local-by-default": "^1.0.0",
     "postcss-modules-scope": "^1.0.0",