diff --git a/package.json b/package.json
index 65d0dc5..316902d 100644
--- a/package.json
+++ b/package.json
@@ -93,7 +93,7 @@
     "@typescript-eslint/parser": "^8.58.0",
     "commitlint": "^21.0.2",
     "concurrently": "^10.0.3",
-    "cssnano": "^8.0.2",
+    "cssnano": "^9.0.4",
     "cypress": "^16.0.0",
     "cypress-plugin-tab": "^2.0.0",
     "doctoc": "^2.2.0",