diff --git a/yarn.lock b/yarn.lock
index a156169..5558746 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1291,9 +1291,9 @@ acorn-walk@^6.1.1:
   integrity sha1-Ejy487hMIXHx9/slJhWxx4prGow=
 
 acorn@^6.0.7, acorn@^6.1.1, acorn@^6.2.1:
-  version "6.3.0"
-  resolved "https://registry.npm.taobao.org/acorn/download/acorn-6.3.0.tgz?cache=0&sync_timestamp=1569334654641&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Facorn%2Fdownload%2Facorn-6.3.0.tgz#0087509119ffa4fc0a0041d1e93a417e68cb856e"
-  integrity sha1-AIdQkRn/pPwKAEHR6TpBfmjLhW4=
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.1.tgz#531e58ba3f51b9dacb9a6646ca4debf5b14ca474"
+  integrity sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==
 
 acorn@^7.1.1:
   version "7.1.1"