diff --git a/package-lock.json b/package-lock.json
index 44d8be8..a632847 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
       "devDependencies": {
         "@vercel/ncc": "^0.38.1",
         "linefix": "^0.1.1",
-        "typescript": "5.4.3"
+        "typescript": "5.9.3"
       }
     },
     "node_modules/@actions/buildjet-cache": {
@@ -1808,10 +1808,11 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.4.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.3.tgz",
-      "integrity": "sha512-KrPd3PKaCLr78MalgiwJnA25Nm8HAmdwN3mYUYZgG/wizIo9EainNVQI9/yDavtVFRN2h3k8uf3GLHuhDMgEHg==",
+      "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"
diff --git a/package.json b/package.json
index 5552a7c..d63c9d6 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   "devDependencies": {
     "@vercel/ncc": "^0.38.1",
     "linefix": "^0.1.1",
-    "typescript": "5.4.3"
+    "typescript": "5.9.3"
   },
   "scripts": {
     "build": "ncc build --target es2020 -o dist/restore src/restore.ts && ncc build --target es2020 -o dist/save src/save.ts && linefix dist"