diff --git a/package.json b/package.json
index 188331d..f25555f 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "lazyrequire": "^1.2.1",
     "mkdirp": "0",
     "mz": "^2.0.0",
-    "postcss": "^5.0.10",
+    "postcss": "^5.0.21",
     "slave": "^1.2.2",
     "uglify-js": "^2.4.24"
   },