diff --git a/functions/package-lock.json b/functions/package-lock.json
index b3da530..b49281a 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -3112,9 +3112,9 @@
       }
     },
     "typescript": {
-      "version": "3.8.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
-      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
+      "version": "3.9.9",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.9.tgz",
+      "integrity": "sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==",
       "dev": true
     },
     "unique-string": {
diff --git a/functions/package.json b/functions/package.json
index 99b71f8..6341401 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -29,7 +29,7 @@
     "lint-staged": "10.0.8",
     "prettier": "1.19.1",
     "tslint": "6.1.0",
-    "typescript": "3.8.3"
+    "typescript": "3.9.9"
   },
   "private": true,
   "husky": {