diff --git a/package-lock.json b/package-lock.json
index dfe2289..4649d9a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,7 +18,7 @@
       "devDependencies": {
         "@types/chai": "^4.2.21",
         "@types/chai-as-promised": "^7.1.4",
-        "@types/mocha": "^8.2.3",
+        "@types/mocha": "^9.0.0",
         "@types/node": "^16.4.13",
         "@types/tampermonkey": "^4.0.2",
         "@types/yargs": "^17.0.2",
@@ -279,9 +279,9 @@
       "dev": true
     },
     "node_modules/@types/mocha": {
-      "version": "8.2.3",
-      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-8.2.3.tgz",
-      "integrity": "sha512-ekGvFhFgrc2zYQoX4JeZPmVzZxw6Dtllga7iGHzfbYIYkAMUx/sAFP2GdFpLff+vdHXu5fl7WX9AT+TtqYcsyw==",
+      "version": "9.0.0",
+      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-9.0.0.tgz",
+      "integrity": "sha512-scN0hAWyLVAvLR9AyW7HoFF5sJZglyBsbPuHO4fv7JRvfmPBMfp1ozWqOf/e4wwPNxezBZXRfWzMb6iFLgEVRA==",
       "dev": true
     },
     "node_modules/@types/node": {
@@ -2852,9 +2852,9 @@
       "dev": true
     },
     "@types/mocha": {
-      "version": "8.2.3",
-      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-8.2.3.tgz",
-      "integrity": "sha512-ekGvFhFgrc2zYQoX4JeZPmVzZxw6Dtllga7iGHzfbYIYkAMUx/sAFP2GdFpLff+vdHXu5fl7WX9AT+TtqYcsyw==",
+      "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 80f3890..1e714e8 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
   "devDependencies": {
     "@types/chai": "^4.2.21",
     "@types/chai-as-promised": "^7.1.4",
-    "@types/mocha": "^8.2.3",
+    "@types/mocha": "^9.0.0",
     "@types/node": "^16.4.13",
     "@types/tampermonkey": "^4.0.2",
     "@types/yargs": "^17.0.2",