diff --git a/docs/day5/cdk/package-lock.json b/docs/day5/cdk/package-lock.json
index fd22953..3c1ac1a 100644
--- a/docs/day5/cdk/package-lock.json
+++ b/docs/day5/cdk/package-lock.json
@@ -15,7 +15,7 @@
         "day5-cdk": "bin/day5-cdk.js"
       },
       "devDependencies": {
-        "@types/node": "^24.0.0",
+        "@types/node": "^25.9.3",
         "aws-cdk": "^2.1129.0",
         "source-map-support": "^0.5.21",
         "ts-node": "^10.9.2",
@@ -140,13 +140,13 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "24.13.2",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.13.2.tgz",
-      "integrity": "sha512-fRa09kZTgu8o71KFcDjUFuc7F+dEbZYZmkI0mg5YBTRs0yMKjYHsq/c0urDKeDb+D5qVgXOdFcuu+DZPKOITwA==",
+      "version": "25.9.3",
+      "resolved": "https://npm.flatt.tech/@types/node/-/node-25.9.3.tgz",
+      "integrity": "sha512-603BddQMv3pUcr4U2dhujk83N2tTDVr/34wII2B6bJy6g+8WD6yUb11jszNs0gdi4PesVWl7ABt8nYMVpnLUcg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": "~7.18.0"
+        "undici-types": ">=7.24.0 <7.24.7"
       }
     },
     "node_modules/acorn": {
@@ -682,9 +682,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "7.18.2",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",
-      "integrity": "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==",
+      "version": "7.24.6",
+      "resolved": "https://npm.flatt.tech/undici-types/-/undici-types-7.24.6.tgz",
+      "integrity": "sha512-WRNW+sJgj5OBN4/0JpHFqtqzhpbnV0GuB+OozA9gCL7a993SmU+1JBZCzLNxYsbMfIeDL+lTsphD5jN5N+n0zg==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/docs/day5/cdk/package.json b/docs/day5/cdk/package.json
index aea1a09..3d49d44 100644
--- a/docs/day5/cdk/package.json
+++ b/docs/day5/cdk/package.json
@@ -10,7 +10,7 @@
     "cdk": "cdk"
   },
   "devDependencies": {
-    "@types/node": "^24.0.0",
+    "@types/node": "^25.9.3",
     "aws-cdk": "^2.1129.0",
     "source-map-support": "^0.5.21",
     "ts-node": "^10.9.2",