diff --git a/package-lock.json b/package-lock.json
index d61ec24..9e364af 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6683,9 +6683,9 @@
       }
     },
     "typescript": {
-      "version": "3.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.3.tgz",
-      "integrity": "sha512-D/wqnB2xzNFIcoBG9FG8cXRDjiqSTbG2wd8DMZeQyJlP1vfTkIxH4GKveWaEBYySKIg+USu+E+EDIR47SqnaMQ==",
+      "version": "4.3.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.5.tgz",
+      "integrity": "sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==",
       "dev": true
     },
     "uglify-js": {
diff --git a/package.json b/package.json
index a4f094e..2a65d0c 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "supertest": "^4.0.2",
     "ts-node": "^8.1.0",
     "typemoq": "^2.1.0",
-    "typescript": "^3.9.3"
+    "typescript": "^4.3.5"
   },
   "dependencies": {
     "@types/express-session": "^1.15.12",