diff --git a/packages/cli/package.json b/packages/cli/package.json
index 084254d7ff..ace0639cce 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -84,12 +84,12 @@
     "rollup-pluginutils": "^2.8.2",
     "start-server-webpack-plugin": "^2.2.5",
     "style-loader": "^1.2.1",
-    "sucrase": "^3.14.1",
+    "sucrase": "^3.16.0",
     "tar": "^6.0.1",
     "terser-webpack-plugin": "^1.4.3",
     "ts-jest": "^26.0.0",
     "ts-loader": "^7.0.4",
-    "typescript": "^3.9.3",
+    "typescript": "^4.0.3",
     "url-loader": "^4.1.0",
     "webpack": "^4.41.6",
     "webpack-dev-server": "^3.11.0",
diff --git a/packages/docgen/package.json b/packages/docgen/package.json
index 61efc0bbd4..7c0bf846bd 100644
--- a/packages/docgen/package.json
+++ b/packages/docgen/package.json
@@ -31,7 +31,7 @@
     "fs-extra": "^9.0.0",
     "github-slugger": "^1.3.0",
     "ts-node": "^8.6.2",
-    "typescript": "^3.9.3"
+    "typescript": "^4.0.3"
   },
   "devDependencies": {
     "@types/fs-extra": "^9.0.1",
diff --git a/yarn.lock b/yarn.lock
index 4d28072207..9a5bd93ffb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -21732,10 +21732,10 @@ subscriptions-transport-ws@^0.9.11, subscriptions-transport-ws@^0.9.16:
     symbol-observable "^1.0.4"
     ws "^5.2.0"
 
-sucrase@^3.14.1:
-  version "3.15.0"
-  resolved "https://registry.npmjs.org/sucrase/-/sucrase-3.15.0.tgz#78596a78be7264a65b52ed8d873883413ef0220c"
-  integrity sha512-05TJOUfMgckH7wKqfk/1p4G6q16nIeW/GHQwD44vkT0mQMqqzgfHCwkX3whNmwyOo7nVF0jDLwVu/qOBTtsscw==
+sucrase@^3.16.0:
+  version "3.16.0"
+  resolved "https://registry.npmjs.org/sucrase/-/sucrase-3.16.0.tgz#19b5b886ccca270dd5ca12ff060eeaf0b599735f"
+  integrity sha512-ovVuswxV5TayCPXfTk8bgBgk6uNRvsinIkEpq0J6zS1xXCx5N/LLGcbsKdRhqn/ToZylMX6+yXaR1LSn1I42Pg==
   dependencies:
     commander "^4.0.0"
     glob "7.1.6"
@@ -22702,10 +22702,10 @@ typedarray@^0.0.6:
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.9.3:
-  version "3.9.7"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
-  integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
+typescript@^4.0.3:
+  version "4.0.3"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-4.0.3.tgz#153bbd468ef07725c1df9c77e8b453f8d36abba5"
+  integrity sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==
 
 ua-parser-js@^0.7.18:
   version "0.7.21"