diff --git a/yarn.lock b/yarn.lock
index bf7138c..1be3c08 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1553,9 +1553,9 @@ acorn-walk@^6.0.1:
   integrity sha1-Ejy487hMIXHx9/slJhWxx4prGow=
 
 acorn@^5.5.3:
-  version "5.7.3"
-  resolved "https://registry.npm.taobao.org/acorn/download/acorn-5.7.3.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Facorn%2Fdownload%2Facorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
-  integrity sha1-Z6ojG/iBKXS4UjWpZ3Hra9B+onk=
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 acorn@^6.0.1, acorn@^6.0.4, acorn@^6.0.5, acorn@^6.0.7:
   version "6.2.0"