diff --git a/package.json b/package.json
index 3c680a9..14a1576 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "xss": "^1.0.14"
   },
   "devDependencies": {
-    "@ava/typescript": "^1.1.1",
+    "@ava/typescript": "^4.0.0",
     "@istanbuljs/nyc-config-typescript": "^1.0.1",
     "@types/express": "^4.17.17",
     "@typescript-eslint/eslint-plugin": "^4.0.1",