diff --git a/package-lock.json b/package-lock.json
index 28139f3..e365f73 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -43,9 +43,9 @@
       "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 d241d98..3522f4d 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "rxjs": "^6.5.3"
   },
   "devDependencies": {
-    "@types/mocha": "^8.0.3",
+    "@types/mocha": "^9.0.0",
     "@types/debug": "4.1.5",
     "@types/node": "^12.12.14",
     "mocha": "^8.1.1",