diff --git a/package.json b/package.json
index 8bed1c9..5f63e5c 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "ts-jest": "^24.3.0",
     "ts-node": "^8.8.2",
     "tslint-config-standard": "^9.0.0",
-    "typescript": "^3.5.3",
+    "typescript": "^4.3.5",
     "typescript-eslint-parser": "^22.0.0"
   },
   "dependencies": {
diff --git a/yarn.lock b/yarn.lock
index 31e0f95..cc90e7e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4612,10 +4612,10 @@ typescript-estree@18.0.0:
     lodash.unescape "4.0.1"
     semver "5.5.0"
 
-typescript@^3.5.3:
-  version "3.5.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
-  integrity sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==
+typescript@^4.3.5:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
+  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
 
 union-value@^1.0.0:
   version "1.0.0"