diff --git a/package-lock.json b/package-lock.json
index e74ddf929..5d4cf12a4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -52,7 +52,7 @@
         "npm-run-all": "^4.1.5",
         "prettier": "^3.2.5",
         "standard-version": "^9.3.2",
-        "typescript": "^5.4.3",
+        "typescript": "^5.4.4",
         "vitest": "^1.3.1"
       },
       "engines": {
@@ -12374,9 +12374,9 @@
       "dev": true
     },
     "node_modules/typescript": {
-      "version": "5.4.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.3.tgz",
-      "integrity": "sha512-KrPd3PKaCLr78MalgiwJnA25Nm8HAmdwN3mYUYZgG/wizIo9EainNVQI9/yDavtVFRN2h3k8uf3GLHuhDMgEHg==",
+      "version": "5.4.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.4.tgz",
+      "integrity": "sha512-dGE2Vv8cpVvw28v8HCPqyb08EzbBURxDpuhJvTrusShUfGnhHBafDsLdS1EhhxyL6BJQE+2cT3dDPAv+MQ6oLw==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
diff --git a/package.json b/package.json
index 11280bf7c..1bf825225 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
     "npm-run-all": "^4.1.5",
     "prettier": "^3.2.5",
     "standard-version": "^9.3.2",
-    "typescript": "^5.4.3",
+    "typescript": "^5.4.4",
     "vitest": "^1.3.1"
   },
   "homepage": "https://github.com/cybozu/duck",