diff --git a/package.json b/package.json
index 955d119e2..3f9722540 100644
--- a/package.json
+++ b/package.json
@@ -59,6 +59,6 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.3.2",
         "tslint": "5.19.0",
-        "typescript": "3.5.3"
+        "typescript": "4.3.5"
     }
 }
diff --git a/yarn.lock b/yarn.lock
index 4623d888a..b8b8ade4c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7413,9 +7413,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@3.5.3:
-  version "3.5.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
+typescript@4.3.5:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
 
 typewise-core@^1.2, typewise-core@^1.2.0:
   version "1.2.0"