diff --git a/userguide/package.json b/userguide/package.json
index 5f1ec6ab17..abad3fa2b5 100644
--- a/userguide/package.json
+++ b/userguide/package.json
@@ -19,6 +19,6 @@
   "dependencies": {},
   "devDependencies": {
     "autoprefixer": "^9.5.0",
-    "postcss-cli": "^5.0.1"
+    "postcss-cli": "^7.1.1"
   }
 }