diff --git a/package-lock.json b/package-lock.json
index d98291f..21df06d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2324,9 +2324,9 @@
       "dev": true
     },
     "@types/node": {
-      "version": "15.12.5",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-15.12.5.tgz",
-      "integrity": "sha512-se3yX7UHv5Bscf8f1ERKvQOD6sTyycH3hdaoozvaLxgUiY5lIGEeH37AD0G0Qi9kPqihPn0HOfd2yaIEN9VwEg==",
+      "version": "18.11.9",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.9.tgz",
+      "integrity": "sha512-CRpX21/kGdzjOpFsZSkcrXMGIBWMGNIHXXBVFSH+ggkftxg+XYP20TESbh+zFvFj3EQOl5byk0HTRn1IL6hbqg==",
       "dev": true
     },
     "@types/normalize-package-data": {
diff --git a/package.json b/package.json
index 1c0a1f0..aa484ba 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
   "devDependencies": {
     "@cybozu/eslint-config": "^13.0.0",
     "@types/jest": "^26.0.23",
-    "@types/node": "^15.12.5",
+    "@types/node": "^18.11.9",
     "@types/yaml-front-matter": "^4.1.0",
     "@typescript-eslint/parser": "^4.23.0",
     "@vercel/ncc": "^0.28.5",