diff --git a/package.json b/package.json
index cf091b0..3958ebc 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "flow-bin": "^0.61.0",
     "mocha": "^5.0.0",
     "nyc": "^11.0.1",
-    "postcss": "^6.0.7",
+    "postcss": "^7.0.0",
     "postcss-modules": "^1.0.0",
     "sinon": "^4.0.1",
     "sinon-chai": "^2.8.0",