diff --git a/package-lock.json b/package-lock.json
index 472cfdd..b5a4731 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -809,9 +809,9 @@
       }
     },
     "typescript": {
-      "version": "3.6.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.6.3.tgz",
-      "integrity": "sha512-N7bceJL1CtRQ2RiG0AQME13ksR7DiuQh/QehubYcghzv20tnh+MQnQIuJddTmsbqYj+dztchykemz0zFzlvdQw==",
+      "version": "4.3.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.5.tgz",
+      "integrity": "sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==",
       "dev": true
     },
     "uglify-es": {
diff --git a/package.json b/package.json
index f14dce6..a769d23 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "mocha": "^6.1.4",
     "rollup": "^1.13.1",
     "tslint": "^5.11.0",
-    "typescript": "^3.2.1",
+    "typescript": "^4.3.5",
     "uglify-es": "^3.3.9"
   }
 }