diff --git a/yarn.lock b/yarn.lock
index a5aae83..390424d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1119,9 +1119,9 @@ acorn-dynamic-import@^4.0.0:
   integrity sha1-SCIQFAWCo2uDw+NC4c/ryqkkCUg=
 
 acorn@^6.0.5:
-  version "6.2.0"
-  resolved "https://registry.npm.taobao.org/acorn/download/acorn-6.2.0.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Facorn%2Fdownload%2Facorn-6.2.0.tgz#67f0da2fc339d6cfb5d6fb244fd449f33cd8bbe3"
-  integrity sha1-Z/DaL8M51s+11vskT9RJ8zzYu+M=
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.1.tgz#531e58ba3f51b9dacb9a6646ca4debf5b14ca474"
+  integrity sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==
 
 agent-base@^4.3.0:
   version "4.3.0"