diff --git a/package-lock.json b/package-lock.json
index 6a7a0c5..46aac36 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
         "wellmarked-mcp": "dist/index.js"
       },
       "devDependencies": {
-        "@types/node": "^25.9.2",
+        "@types/node": "^26.1.0",
         "rimraf": "^6.1.3",
         "typescript": "^6.0.3"
       },
@@ -92,13 +92,13 @@
       }
     },
     "node_modules/@types/node": {
-      "version": "25.9.2",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.9.2.tgz",
-      "integrity": "sha512-G05zqtJhcDLb8uslf5EjCxXg9G1KQxiV8OS0R26IC//Eoyitzqe8z37I7cqvnZlrlSfgocQRfSn/AHBZJJFyGw==",
+      "version": "26.1.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.1.0.tgz",
+      "integrity": "sha512-O0A1G3xPGy4w7AgQdAQYUlQ+BKk2Oovw8eRpofyp5KdBZULnbe+WqaOVNrm705SHphCiG4XHsACrSmPu1f+Kgw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": ">=7.24.0 <7.24.7"
+        "undici-types": "~8.3.0"
       }
     },
     "node_modules/accepts": {
@@ -1268,9 +1268,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "7.24.6",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.24.6.tgz",
-      "integrity": "sha512-WRNW+sJgj5OBN4/0JpHFqtqzhpbnV0GuB+OozA9gCL7a993SmU+1JBZCzLNxYsbMfIeDL+lTsphD5jN5N+n0zg==",
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.3.0.tgz",
+      "integrity": "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/package.json b/package.json
index fb3200c..61c8ac5 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
     "zod": "^4.4.3"
   },
   "devDependencies": {
-    "@types/node": "^25.9.2",
+    "@types/node": "^26.1.0",
     "rimraf": "^6.1.3",
     "typescript": "^6.0.3"
   },