diff --git a/yarn.lock b/yarn.lock
index d640101..48a0101 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -985,9 +985,9 @@ acorn-dynamic-import@^4.0.0:
   integrity sha1-SCIQFAWCo2uDw+NC4c/ryqkkCUg=
 
 acorn@^6.0.5:
-  version "6.1.1"
-  resolved "https://registry.npm.taobao.org/acorn/download/acorn-6.1.1.tgz#7d25ae05bb8ad1f9b699108e1094ecd7884adc1f"
-  integrity sha1-fSWuBbuK0fm2mRCOEJTs14hK3B8=
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.1.tgz#531e58ba3f51b9dacb9a6646ca4debf5b14ca474"
+  integrity sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==
 
 agentkeepalive@^2.2.0:
   version "2.2.0"