diff --git a/package.json b/package.json
index 8f0d6e9..f86f232 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,6 @@
 	"devDependencies": {
 		"rimraf": "^3.0.2",
 		"ts-node": "^8.6.2",
-		"typescript": "^3.8.3"
+		"typescript": "^4.0.3"
 	}
 }
diff --git a/yarn.lock b/yarn.lock
index 1c928f7..5f48b1c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1505,10 +1505,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.8.3:
-  version "3.9.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.5.tgz#586f0dba300cde8be52dd1ac4f7e1009c1b13f36"
-  integrity sha512-hSAifV3k+i6lEoCJ2k6R2Z/rp/H3+8sdmcn5NrS3/3kE7+RyZXm9aqvxWqjEXHAd8b0pShatpcdMTvEdvAJltQ==
+typescript@^4.0.3:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.3.tgz#153bbd468ef07725c1df9c77e8b453f8d36abba5"
+  integrity sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==
 
 universalify@^0.1.0:
   version "0.1.2"