diff --git a/package.json b/package.json
index 3e69f9b..2ff3a7c 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "express": "^4.17.1",
     "io-ts": "^2.2.10",
     "io-ts-types": "^0.5.10",
-    "typescript": "^4.0.2"
+    "typescript": "^4.3.5"
   },
   "peerDependencies": {
     "@types/express": "^4.17.7",
diff --git a/yarn.lock b/yarn.lock
index 45c9d25..c66e34c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -448,10 +448,10 @@ type-is@~1.6.17, type-is@~1.6.18:
     media-typer "0.3.0"
     mime-types "~2.1.24"
 
-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==
+typescript@^4.3.5:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
+  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
 
 unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"