diff --git a/package.json b/package.json
index 2a130b9..83ebef7 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "npm-run-all": "^4.0.2",
     "nyc": "^11.4.1",
     "semistandard": "^12.0.0",
-    "stylelint": "^8.4.0",
+    "stylelint": "^9.1.1",
     "testdouble": "^3.3.1"
   },
   "scripts": {