diff --git a/package.json b/package.json
index fa2fd92..f05c14e 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "license": "ISC",
   "dependencies": {
     "chai": "^4.1.2",
-    "mocha": "^5.0.3",
+    "mocha": "^9.2.2",
     "postcss": "^7.0.26",
     "postcss-nested": "https://github.com/sparkbox/postcss-nested/tarball/master",
     "postcss-nested-vars": "^1.0.0",