diff --git a/package.json b/package.json
index c60d435..4cf97b2 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   },
   "devDependencies": {
     "ist": "^1.0.0",
-    "mocha": "^3.0.2",
+    "mocha": "^9.1.2",
     "prosemirror-test-builder": "^1.0.0",
     "rollup": "^2.26.3",
     "@rollup/plugin-buble": "^0.21.3"