diff --git a/yarn.lock b/yarn.lock
index 7d0a7f72f..163c76132 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1321,20 +1321,10 @@ acorn-walk@^6.1.1:
   resolved "https://registry.npm.taobao.org/acorn-walk/download/acorn-walk-6.2.0.tgz#123cb8f3b84c2171f1f7fb252615b1c78a6b1a8c"
   integrity sha1-Ejy487hMIXHx9/slJhWxx4prGow=
 
-acorn@^6.0.1, acorn@^6.0.4, 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=
-
-acorn@^6.0.7, acorn@^6.1.1:
-  version "6.2.1"
-  resolved "https://registry.npm.taobao.org/acorn/download/acorn-6.2.1.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Facorn%2Fdownload%2Facorn-6.2.1.tgz#3ed8422d6dec09e6121cc7a843ca86a330a86b51"
-  integrity sha1-PthCLW3sCeYSHMeoQ8qGozCoa1E=
-
-acorn@^6.2.1:
-  version "6.4.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.0.tgz#b659d2ffbafa24baf5db1cdbb2c94a983ecd2784"
-  integrity sha512-gac8OEcQ2Li1dxIEWGZzsp2BitJxwkwcOm0zHAJLcPJaVvm58FRnk6RkuLRpU1EujipU2ZFODv2P9DLMfnV8mw==
+acorn@^6.0.1, acorn@^6.0.4, acorn@^6.0.5, acorn@^6.0.7, acorn@^6.1.1, acorn@^6.2.1:
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.1.tgz#531e58ba3f51b9dacb9a6646ca4debf5b14ca474"
+  integrity sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==
 
 address@^1.0.3:
   version "1.1.0"