diff --git a/functions/package-lock.json b/functions/package-lock.json
index 5eb7e74..a68762d 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -2659,9 +2659,9 @@
       }
     },
     "typescript": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.2.tgz",
-      "integrity": "sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==",
+      "version": "4.3.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.5.tgz",
+      "integrity": "sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==",
       "dev": true
     },
     "unique-string": {
diff --git a/functions/package.json b/functions/package.json
index 9f3422f..a7ec449 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -25,7 +25,7 @@
   "devDependencies": {
     "firebase-functions-test": "^0.2.1",
     "tslint": "^6.1.2",
-    "typescript": "^4.0.2"
+    "typescript": "^4.3.5"
   },
   "private": true
 }