diff --git a/package.json b/package.json
index 1d6cab35..b069d17d 100644
--- a/package.json
+++ b/package.json
@@ -105,7 +105,7 @@
     "tsify": "^4.0.0",
     "tslib": "^2.0.0",
     "tslint": "^6",
-    "typescript": "^3",
+    "typescript": "^4",
     "webpack": "^4.32.2",
     "webpack-cli": "^3.3.4"
   },
diff --git a/yarn.lock b/yarn.lock
index 210235cf..e3d98961 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9029,10 +9029,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3:
-  version "3.9.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.3.tgz#d3ac8883a97c26139e42df5e93eeece33d610b8a"
-  integrity sha512-D/wqnB2xzNFIcoBG9FG8cXRDjiqSTbG2wd8DMZeQyJlP1vfTkIxH4GKveWaEBYySKIg+USu+E+EDIR47SqnaMQ==
+typescript@^4:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.3.tgz#153bbd468ef07725c1df9c77e8b453f8d36abba5"
+  integrity sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==
 
 ugly-adapter@^1.1.0:
   version "1.3.1"