diff --git a/package.json b/package.json
index bcbb943d1d..63563c82eb 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "shx": "^0.3.2",
     "source-map-support": "^0.5.19",
     "typedoc": "^0.17.8",
-    "typescript": "~3.9",
+    "typescript": "~4.0",
     "webpack": "^4.43.0",
     "webpack-cli": "^3.3.12"
   }
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 54aff0c41d..d728ccca2f 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -53,7 +53,7 @@
     "diff": "^4",
     "recast": "^0.18.0",
     "ts-node": "^8",
-    "typescript": "~3.9",
+    "typescript": "~4.0",
     "yargs": "^15.3.1"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 2ee61cfe72..3427a09b52 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8638,10 +8638,10 @@ typedoc@^0.17.8:
     shelljs "^0.8.4"
     typedoc-default-themes "^0.10.2"
 
-typescript@~3.9:
-  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:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.3.tgz#153bbd468ef07725c1df9c77e8b453f8d36abba5"
+  integrity sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==
 
 ua-parser-js@0.7.21:
   version "0.7.21"