diff --git a/package.json b/package.json
index bd30322..3f043d5 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   },
   "dependencies": {
     "ts-node": "^10.9.1",
-    "typescript": "^4.9.5"
+    "typescript": "^5.0.3"
   },
   "devDependencies": {
     "@cybozu/eslint-config": "^18.0.2",