diff --git a/package-lock.json b/package-lock.json
index 1557e87..baebfe9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
         "kuromojin": "^3.0.0"
       },
       "devDependencies": {
-        "@types/node": "^18.13.0",
+        "@types/node": "^22.8.1",
         "dirname-filename-esm": "^1.1.1",
         "prettier": "^3.3.3",
         "tsx": "^4.19.2",
@@ -429,10 +429,13 @@
       }
     },
     "node_modules/@types/node": {
-      "version": "18.13.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.13.0.tgz",
-      "integrity": "sha512-gC3TazRzGoOnoKAhUx+Q0t8S9Tzs74z7m0ipwGpSqQrleP14hKxP4/JUeEQcD3W1/aIpnWl8pHowI7WokuZpXg==",
-      "dev": true
+      "version": "22.8.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.8.1.tgz",
+      "integrity": "sha512-k6Gi8Yyo8EtrNtkHXutUu2corfDf9su95VYVP10aGYMMROM6SAItZi0w1XszA6RtWTHSVp5OeFof37w0IEqCQg==",
+      "dev": true,
+      "dependencies": {
+        "undici-types": "~6.19.8"
+      }
     },
     "node_modules/async": {
       "version": "2.6.4",
@@ -614,6 +617,12 @@
         "node": ">=12.20"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.19.8",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
+      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
+      "dev": true
+    },
     "node_modules/zlibjs": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/zlibjs/-/zlibjs-0.3.1.tgz",
@@ -793,10 +802,13 @@
       "optional": true
     },
     "@types/node": {
-      "version": "18.13.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.13.0.tgz",
-      "integrity": "sha512-gC3TazRzGoOnoKAhUx+Q0t8S9Tzs74z7m0ipwGpSqQrleP14hKxP4/JUeEQcD3W1/aIpnWl8pHowI7WokuZpXg==",
-      "dev": true
+      "version": "22.8.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.8.1.tgz",
+      "integrity": "sha512-k6Gi8Yyo8EtrNtkHXutUu2corfDf9su95VYVP10aGYMMROM6SAItZi0w1XszA6RtWTHSVp5OeFof37w0IEqCQg==",
+      "dev": true,
+      "requires": {
+        "undici-types": "~6.19.8"
+      }
     },
     "async": {
       "version": "2.6.4",
@@ -928,6 +940,12 @@
       "integrity": "sha512-xv8mOEDnigb/tN9PSMTwSEqAnUvkoXMQlicOb0IUVDBSQCgBSaAAROUZYy2IcUy5qU6XajK5jjjO7TMWqBTKZA==",
       "dev": true
     },
+    "undici-types": {
+      "version": "6.19.8",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
+      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
+      "dev": true
+    },
     "zlibjs": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/zlibjs/-/zlibjs-0.3.1.tgz",
diff --git a/package.json b/package.json
index 46078be..df7eeec 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
   },
   "homepage": "https://github.com/otariidae/ke2daira.js#readme",
   "devDependencies": {
-    "@types/node": "^18.13.0",
+    "@types/node": "^22.8.1",
     "dirname-filename-esm": "^1.1.1",
     "prettier": "^3.3.3",
     "tsx": "^4.19.2",