diff --git a/package.json b/package.json
index d1db3759d..0ae06bedf 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   },
   "devDependencies": {
     "chai": "^4.3.6",
-    "mocha": "^9.2.0"
+    "mocha": "^10.4.0"
   },
   "bugs": {
     "url": "https://github.com/stylus/stylus/issues"