diff --git a/package.json b/package.json
index 2857810aa..d0c785340 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "http-server": "^0.12.0",
     "semantic-release": "^17.0.4",
     "tslint": "^6.0.0",
-    "typescript": "^3.0.3"
+    "typescript": "^4.0.2"
   },
   "dependencies": {
     "@percy/agent": "~0",
diff --git a/yarn.lock b/yarn.lock
index caa30fca6..8d9a41a12 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6281,10 +6281,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.0.3:
-  version "3.9.7"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
-  integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
+typescript@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
+  integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
 
 uglify-js@^3.1.4:
   version "3.9.3"