diff --git a/package-lock.json b/package-lock.json
index 3ac2c34..4311160 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
       "devDependencies": {
         "@types/node": "^24.0.10",
         "@vercel/ncc": "^0.38.3",
-        "typescript": "^4.1.2"
+        "typescript": "^5.9.3"
       }
     },
     "node_modules/@actions/core": {
@@ -343,17 +343,16 @@
       }
     },
     "node_modules/typescript": {
-      "version": "4.9.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
-      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
+      "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": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
       },
       "engines": {
-        "node": ">=4.2.0"
+        "node": ">=14.17"
       }
     },
     "node_modules/undici-types": {
@@ -584,9 +583,9 @@
       "integrity": "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg=="
     },
     "typescript": {
-      "version": "4.9.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
-      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true
     },
     "undici-types": {
diff --git a/package.json b/package.json
index 145b41e..2cab5c9 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,6 @@
   "devDependencies": {
     "@types/node": "^24.0.10",
     "@vercel/ncc": "^0.38.3",
-    "typescript": "^4.1.2"
+    "typescript": "^5.9.3"
   }
 }