diff --git a/package.json b/package.json
index 908390b..3f6c113 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "ava": "^3.15.0",
     "eslint": "^7.32.0",
     "eslint-config-abema": "https://github.com/cats-oss/eslint-config-abema/archive/72a943d6271704c5e87cf22d803f409a735398b7.tar.gz",
-    "typescript": "^4.6.3"
+    "typescript": "^4.9.5"
   },
   "dependencies": {
     "@octokit/rest": "^18.12.0"
diff --git a/yarn.lock b/yarn.lock
index 3dc8c4a..4f924c2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2956,10 +2956,10 @@ typedarray-to-buffer@^3.1.5:
   dependencies:
     is-typedarray "^1.0.0"
 
-typescript@^4.6.3:
-  version "4.6.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.6.3.tgz#eefeafa6afdd31d725584c67a0eaba80f6fc6c6c"
-  integrity sha512-yNIatDa5iaofVozS/uQJEl3JRWLKKGJKh6Yaiv0GLGSuhpFJe7P3SbHZ8/yjAHRQwKRoA6YZqlfjXWmVzoVSMw==
+typescript@^4.9.5:
+  version "4.9.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.5.tgz#095979f9bcc0d09da324d58d03ce8f8374cbe65a"
+  integrity sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==
 
 unbox-primitive@^1.0.1:
   version "1.0.1"