diff --git a/package.json b/package.json
index 2ff8c09..78fc867 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "broccoli-persistent-filter": "^1.2.12",
     "ember-cli-babel": "^5.1.7",
     "glob": "^7.1.1",
-    "postcss": "^5.2.8"
+    "postcss": "^7.0.18"
   },
   "devDependencies": {
     "babel-core": "^5.8.38",