diff --git a/package.json b/package.json
index 1a07e8f..15a5822 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "@semantic-release/git": "^9.0.0",
     "@types/chai": "^4.2.13",
     "@types/chai-as-promised": "^7.1.2",
-    "@types/mocha": "^8.0.3",
+    "@types/mocha": "^9.0.0",
     "@types/sinon": "^9.0.0",
     "@types/sinon-chai": "^3.2.4",
     "@types/ws": "^7.2.4",
diff --git a/yarn.lock b/yarn.lock
index 9a0cd4d..8fdf67b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -675,10 +675,10 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha1-7ihweulOEdK4J7y+UnC86n8+ce4=
 
-"@types/mocha@^8.0.3":
-  version "8.0.3"
-  resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-8.0.3.tgz#51b21b6acb6d1b923bbdc7725c38f9f455166402"
-  integrity sha512-vyxR57nv8NfcU0GZu8EUXZLTbCMupIUwy95LJ6lllN+JRPG25CwMHoB1q5xKh8YKhQnHYRAn4yW2yuHbf/5xgg==
+"@types/mocha@^9.0.0":
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-9.0.0.tgz#3205bcd15ada9bc681ac20bef64e9e6df88fd297"
+  integrity sha512-scN0hAWyLVAvLR9AyW7HoFF5sJZglyBsbPuHO4fv7JRvfmPBMfp1ozWqOf/e4wwPNxezBZXRfWzMb6iFLgEVRA==
 
 "@types/node@*", "@types/node@>= 8", "@types/node@^12.0.2":
   version "12.12.17"