diff --git a/2018-05/ts-react-default-props/yarn.lock b/2018-05/ts-react-default-props/yarn.lock
index be94d8e..cd545fa 100644
--- a/2018-05/ts-react-default-props/yarn.lock
+++ b/2018-05/ts-react-default-props/yarn.lock
@@ -3543,8 +3543,8 @@ typescript@2.9.2:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.2.tgz#1cbf61d05d6b96269244eb6a3bce4bd914e0f00c"
 
 ua-parser-js@^0.7.9:
-  version "0.7.18"
-  resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.18.tgz#a7bfd92f56edfb117083b69e31d2aa8882d4b1ed"
+  version "0.7.28"
+  resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.28.tgz#8ba04e653f35ce210239c64661685bf9121dec31"
 
 uglify-es@^3.3.9:
   version "3.3.9"