diff --git a/package.json b/package.json
index 4ea9690..a499230 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": "^4.0.2",
     "xhr-mock": "^2.4.1"
   },
   "dependencies": {
diff --git a/yarn.lock b/yarn.lock
index d1ae79c..f0948d3 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@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
+  integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
 
 uglify-js@^3.1.4:
   version "3.8.0"