diff --git a/package.json b/package.json
index 0c074f0..0d4ef1d 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
 		"snyk": "^1.41.1"
 	},
 	"devDependencies": {
-		"@cloudflare/workers-types": "^4.0.0",
+		"@cloudflare/workers-types": "^5.0.0",
 		"@types/koa": "^2.14.0",
 		"@types/koa-router": "^7.4.8",
 		"@types/koa-session": "^6.4.5",