diff --git a/src/microsoft-trydotnet/package-lock.json b/src/microsoft-trydotnet/package-lock.json
index 83a09df7d..c8330d780 100644
--- a/src/microsoft-trydotnet/package-lock.json
+++ b/src/microsoft-trydotnet/package-lock.json
@@ -21,7 +21,7 @@
         "@types/chai-subset": "^1.3.6",
         "@types/jsdom": "^28.0.3",
         "@types/mocha": "^10.0.10",
-        "@types/node": "^25.9.3",
+        "@types/node": "^26.1.2",
         "chai": "6.2.2",
         "chai-as-promised": "8.0.2",
         "jsdom": "29.1.1",
@@ -1099,15 +1099,22 @@
       "dev": true
     },
     "node_modules/@types/node": {
-      "version": "25.9.3",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.9.3.tgz",
-      "integrity": "sha512-603BddQMv3pUcr4U2dhujk83N2tTDVr/34wII2B6bJy6g+8WD6yUb11jszNs0gdi4PesVWl7ABt8nYMVpnLUcg==",
+      "version": "26.1.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.1.2.tgz",
+      "integrity": "sha512-Vu4a5UFA9rIIFJ7rB/Vaafh9lrCQszopTCx6KjFboXTGQbPNasehVR5TEiithSDGyd1DEiUByggTZsg8jukeIg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": ">=7.24.0 <7.24.7"
+        "undici-types": "~8.3.0"
       }
     },
+    "node_modules/@types/node/node_modules/undici-types": {
+      "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"
+    },
     "node_modules/@types/resolve": {
       "version": "1.20.2",
       "resolved": "https://registry.npmjs.org/@types/resolve/-/resolve-1.20.2.tgz",
diff --git a/src/microsoft-trydotnet/package.json b/src/microsoft-trydotnet/package.json
index 98088bfec..6176a4830 100644
--- a/src/microsoft-trydotnet/package.json
+++ b/src/microsoft-trydotnet/package.json
@@ -19,7 +19,7 @@
     "@types/chai-subset": "^1.3.6",
     "@types/jsdom": "^28.0.3",
     "@types/mocha": "^10.0.10",
-    "@types/node": "^25.9.3",
+    "@types/node": "^26.1.2",
     "chai": "6.2.2",
     "chai-as-promised": "8.0.2",
     "jsdom": "29.1.1",