diff --git a/package-lock.json b/package-lock.json
index 5261fa3..bc3eaa6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -433,9 +433,9 @@
       "dev": true
     },
     "@types/mocha": {
-      "version": "8.0.3",
-      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-8.0.3.tgz",
-      "integrity": "sha512-vyxR57nv8NfcU0GZu8EUXZLTbCMupIUwy95LJ6lllN+JRPG25CwMHoB1q5xKh8YKhQnHYRAn4yW2yuHbf/5xgg==",
+      "version": "9.0.0",
+      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-9.0.0.tgz",
+      "integrity": "sha512-scN0hAWyLVAvLR9AyW7HoFF5sJZglyBsbPuHO4fv7JRvfmPBMfp1ozWqOf/e4wwPNxezBZXRfWzMb6iFLgEVRA==",
       "dev": true
     },
     "@types/node": {
diff --git a/package.json b/package.json
index 5dd9e5c..1d31be8 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   },
   "devDependencies": {
     "@types/eslint": "^7.2.2",
-    "@types/mocha": "^8.0.3",
+    "@types/mocha": "^9.0.0",
     "@types/node": "^14.11.5",
     "@typescript-eslint/parser": "^4.1.1",
     "chokidar-cli": "^2.1.0",