diff --git a/package.json b/package.json
index 7263113..f830e07 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "html-minifier": "^3.4.2",
     "http-server": "^0.10.0",
     "markdown": "^0.5.0",
-    "postcss": "^5.2.16",
+    "postcss": "^6.0.14",
     "postcss-autoreset": "^1.2.1",
     "postcss-cli": "^4.1.1",
     "postcss-cssnext": "^2.10.0",
@@ -61,7 +61,7 @@
     "es6-promisify": "^5.0.0",
     "html-minifier": "^3.4.2",
     "markdown": "^0.5.0",
-    "postcss": "^5.2.16",
+    "postcss": "^6.0.14",
     "postcss-autoreset": "^1.2.1",
     "postcss-cli": "^4.1.1",
     "postcss-cssnext": "^2.10.0",