diff --git a/extensions/vscode/package.json b/extensions/vscode/package.json
index 998d7bbf..258bfe8f 100644
--- a/extensions/vscode/package.json
+++ b/extensions/vscode/package.json
@@ -222,7 +222,7 @@
   "devDependencies": {
     "@eslint/js": "^10.0.1",
     "@types/mocha": "^10.0.10",
-    "@types/node": "^24.13.3",
+    "@types/node": "^26.2.0",
     "@types/vscode": "^1.115.0",
     "@vitest/coverage-v8": "^4.1.10",
     "@vscode/test-cli": "^0.0.15",
diff --git a/package-lock.json b/package-lock.json
index c3bbc8bf..436bccdd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,7 +33,7 @@
       "devDependencies": {
         "@eslint/js": "^10.0.1",
         "@types/mocha": "^10.0.10",
-        "@types/node": "^24.13.3",
+        "@types/node": "^26.2.0",
         "@types/vscode": "^1.115.0",
         "@vitest/coverage-v8": "^4.1.10",
         "@vscode/test-cli": "^0.0.15",
@@ -2043,13 +2043,13 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "24.13.3",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.13.3.tgz",
-      "integrity": "sha512-Dh8vAsV36ig5wa9OX4pXvMc9D3Veibfw2wix0CUwYODLD8nkj9UsLjASr49nPg+2eKzxhBV+v7L8pXvT4e639Q==",
+      "version": "26.2.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.2.0.tgz",
+      "integrity": "sha512-5IviulTZeRNp2vAJ514cc/HUlY5nZ9fCbq9DMyC52BrhFZACo3nI0R7qBxhQmo/d27NFe96ur/b7Wwxklda+kg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": "~7.18.0"
+        "undici-types": "~8.3.0"
       }
     },
     "node_modules/@types/normalize-package-data": {
@@ -9682,9 +9682,9 @@
       }
     },
     "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": "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"
     },
@@ -10368,7 +10368,7 @@
         "@eslint/js": "^10.0.1",
         "@types/cors": "^2.8.19",
         "@types/express": "^5.0.6",
-        "@types/node": "^24.13.3",
+        "@types/node": "^26.2.0",
         "@vitest/coverage-v8": "^4.1.10",
         "esbuild": "^0.28.2",
         "eslint": "^10.8.1",
diff --git a/package.json b/package.json
index 15dbed23..ae2942b0 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "typescript-eslint": "^8.67.0"
   },
   "overrides": {
-    "@types/node": "^24.13.3"
+    "@types/node": "^26.2.0"
   },
   "scripts": {
     "build": "npm run build -w server && make -C client build && npm run build -w extensions/vscode",
diff --git a/server/package.json b/server/package.json
index a55e874b..a19ff9c3 100644
--- a/server/package.json
+++ b/server/package.json
@@ -69,7 +69,7 @@
     "@eslint/js": "^10.0.1",
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.6",
-    "@types/node": "^24.13.3",
+    "@types/node": "^26.2.0",
     "@vitest/coverage-v8": "^4.1.10",
     "esbuild": "^0.28.2",
     "eslint": "^10.8.1",