diff --git a/yarn.lock b/yarn.lock
index 4f5d9a7..5b3cb63 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10,8 +10,9 @@ accepts@~1.3.5:
     negotiator "0.6.1"
 
 acorn@^5.0.3:
-  version "5.5.3"
-  resolved "http://registry.npm.taobao.org/acorn/download/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 ajv@^5.1.0:
   version "5.5.2"