diff --git a/package.json b/package.json
index 4ea9690..9b5443c 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "tslint": "^5.4.3",
     "tslint-config-groupby": "^1.0.0",
     "types": "^0.1.1",
-    "typescript": "^3.5.2",
+    "typescript": "^4.0.5",
     "xhr-mock": "^2.4.1"
   },
   "dependencies": {
diff --git a/yarn.lock b/yarn.lock
index d1ae79c..05564cf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3448,10 +3448,10 @@ types@^0.1.1:
   resolved "https://registry.yarnpkg.com/types/-/types-0.1.1.tgz#860c6859d11366293f835d8c95aebcf95029838e"
   integrity sha1-hgxoWdETZik/g12Mla68+VApg44=
 
-typescript@^3.5.2:
-  version "3.5.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.2.tgz#a09e1dc69bc9551cadf17dba10ee42cf55e5d56c"
-  integrity sha512-7KxJovlYhTX5RaRbUdkAXN1KUZ8PwWlTzQdHV6xNqvuFOs7+WBo10TQUqT19Q/Jz2hk5v9TQDIhyLhhJY4p5AA==
+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 "3.8.0"