diff --git a/package.json b/package.json
index e5b6f22..e65c3f1 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "rollup-plugin-filesize": "^6.2.1",
     "rollup-plugin-json": "^4.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-postcss": "^2.0.4",
+    "rollup-plugin-postcss": "^3.1.8",
     "rollup-plugin-serve": "^1.0.1",
     "rollup-plugin-uglify": "^6.0.0",
     "rollup-watch": "^4.3.1",