diff --git a/package-lock.json b/package-lock.json
index f573d25..ce4bacd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
       "devDependencies": {
         "@eslint/js": "^10.0.1",
         "@stylistic/eslint-plugin": "^5.8.0",
-        "@types/node": "^25.3.0",
+        "@types/node": "^26.6.3",
         "eslint": "^10.0.3",
         "llparse-dot": "^1.0.1",
         "llparse-test-fixture": "^5.1.0",
@@ -704,13 +704,13 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "25.6.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.6.0.tgz",
-      "integrity": "sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ==",
+      "version": "26.6.3",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.6.3.tgz",
+      "integrity": "sha512-dsqMQQoeTLqu9wynDD00q573mNzso3IdQOAfHRJqLCcmCFPoGo9A1bDpUcv/9tnKpErQWv9uKeGfl37EIS02Yg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": "~7.19.0"
+        "undici-types": "~8.9.0"
       }
     },
     "node_modules/@typescript-eslint/eslint-plugin": {
@@ -1983,9 +1983,9 @@
       "license": "MIT"
     },
     "node_modules/undici-types": {
-      "version": "7.19.2",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.19.2.tgz",
-      "integrity": "sha512-qYVnV5OEm2AW8cJMCpdV20CDyaN3g0AjDlOGf1OW4iaDEx8MwdtChUp4zu4H0VP3nDRF/8RKWH+IPp9uW0YGZg==",
+      "version": "8.9.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.9.0.tgz",
+      "integrity": "sha512-KTDyRTYX8sWmKXAikPHHSyc63CRPETMctyjKFupcC6OBLXT3xsN0e9aF7m+mIXutFWpUXuedtowG7iLOzp0kQg==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/package.json b/package.json
index f02f102..800343c 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
   "devDependencies": {
     "@eslint/js": "^10.0.1",
     "@stylistic/eslint-plugin": "^5.8.0",
-    "@types/node": "^25.3.0",
+    "@types/node": "^26.6.3",
     "eslint": "^10.0.3",
     "llparse-dot": "^1.0.1",
     "llparse-test-fixture": "^5.1.0",