diff --git a/package-lock.json b/package-lock.json
index 5fcb9fd..13b87ff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,7 @@
         "dedent": "^1.7.0",
         "prettier": "^3.2.5",
         "tsx": "^4.7.1",
-        "typescript": "^5.3.3",
+        "typescript": "^5.9.2",
         "web-features": "^3.1.0"
       },
       "engines": {
@@ -801,10 +801,11 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.3.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.3.3.tgz",
-      "integrity": "sha512-pXWcraxM0uxAS+tN0AG/BF2TyqmHO014Z070UsJ+pFvYuRSq8KH8DmWpnbXe0pEPDHXZV3FcAbJkijJ5oNEnWw==",
+      "version": "5.9.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
+      "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
       "dev": true,
+      "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
diff --git a/package.json b/package.json
index e2a0b3d..1bc4213 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "dedent": "^1.7.0",
     "prettier": "^3.2.5",
     "tsx": "^4.7.1",
-    "typescript": "^5.3.3",
+    "typescript": "^5.9.2",
     "web-features": "^3.1.0"
   }
 }