diff --git a/package-lock.json b/package-lock.json
index cf6a7c7..9da97e9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -314,9 +314,9 @@
 			}
 		},
 		"typescript": {
-			"version": "3.9.5",
-			"resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.5.tgz",
-			"integrity": "sha512-hSAifV3k+i6lEoCJ2k6R2Z/rp/H3+8sdmcn5NrS3/3kE7+RyZXm9aqvxWqjEXHAd8b0pShatpcdMTvEdvAJltQ==",
+			"version": "4.3.5",
+			"resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.5.tgz",
+			"integrity": "sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==",
 			"dev": true
 		},
 		"wrappy": {
diff --git a/package.json b/package.json
index 113f71c..097578d 100644
--- a/package.json
+++ b/package.json
@@ -71,6 +71,6 @@
     "prettier": "^1.19.1",
     "tslint": "^6.1.2",
     "tslint-config-prettier": "^1.18.0",
-    "typescript": "^3.9.5"
+    "typescript": "^4.3.5"
   }
 }