diff --git a/package-lock.json b/package-lock.json
index 49524cc..38a3ca9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,7 +34,7 @@
         "eslint-plugin-primer-react": "1.0.1",
         "jsdom": "20.0.3",
         "prettier": "2.8.0",
-        "typescript": "4.9.3",
+        "typescript": "5.9.3",
         "vite": "5.4.21",
         "vitest": "3.1.1"
       }
@@ -9542,9 +9542,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "4.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.3.tgz",
-      "integrity": "sha512-CIfGzTelbKNEnLpLdGFgdyKhG23CKdKgQPOBc+OUNrkJ2vr+KSzsSV5kq5iWhEQbok+quxgGzrAtGWCyU7tHnA==",
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -9552,7 +9552,7 @@
         "tsserver": "bin/tsserver"
       },
       "engines": {
-        "node": ">=4.2.0"
+        "node": ">=14.17"
       }
     },
     "node_modules/unbox-primitive": {
diff --git a/package.json b/package.json
index 40b0cd1..91c01d5 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "eslint-plugin-primer-react": "1.0.1",
     "jsdom": "20.0.3",
     "prettier": "2.8.0",
-    "typescript": "4.9.3",
+    "typescript": "5.9.3",
     "vite": "5.4.21",
     "vitest": "3.1.1"
   },