diff --git a/yarn.lock b/yarn.lock
index 382e99d..64ae7fd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -980,9 +980,9 @@ accepts@^1.3.5:
     negotiator "0.6.2"
 
 acorn@^6.2.1:
-  version "6.2.1"
-  resolved "https://registry.npm.taobao.org/acorn/download/acorn-6.2.1.tgz#3ed8422d6dec09e6121cc7a843ca86a330a86b51"
-  integrity sha1-PthCLW3sCeYSHMeoQ8qGozCoa1E=
+  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"