diff --git a/package.json b/package.json
index 3e3d0e3..86d62ba 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "devDependencies": {
-    "cssnano": "^8.0.0",
+    "cssnano": "^9.0.4",
     "cssnano-preset-advanced": "^8.0.0",
     "gulp": "^5.0.0",
     "gulp-concat": "^2.6.1",