diff --git a/package.json b/package.json
index 2fdc442..c22605c 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "through": "2.3.8",
     "travis-deploy-once": "5.0.11",
     "tslint": "5.11.0",
-    "typescript": "3.2.4"
+    "typescript": "4.0.5"
   },
   "release": {
     "extends": "@mike-works/workshop-semantic-release-config"
diff --git a/yarn.lock b/yarn.lock
index 2eda529..f0f9a7f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6558,10 +6558,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.2.4:
-  version "3.2.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.2.4.tgz#c585cb952912263d915b462726ce244ba510ef3d"
-  integrity sha512-0RNDbSdEokBeEAkgNbxJ+BLwSManFy9TeXz8uW+48j/xhEXv1ePME60olyzw2XzUqUBNAYFeJadIqAgNqIACwg==
+typescript@4.0.5:
+  version "4.0.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.5.tgz#ae9dddfd1069f1cb5beb3ef3b2170dd7c1332389"
+  integrity sha512-ywmr/VrTVCmNTJ6iV2LwIrfG1P+lv6luD8sUJs+2eI9NLGigaN+nUQc13iHqisq7bra9lnmUSYqbJvegraBOPQ==
 
 uglify-js@^3.1.4:
   version "3.4.9"