diff --git a/yarn.lock b/yarn.lock
index 962079a..fce4cd6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -888,8 +888,8 @@ acorn-walk@^6.1.1:
   resolved "http://172.16.9.19:4873/acorn-walk/-/acorn-walk-6.2.0.tgz#123cb8f3b84c2171f1f7fb252615b1c78a6b1a8c"
 
 acorn@^6.0.7, acorn@^6.2.1:
-  version "6.4.0"
-  resolved "http://172.16.9.19:4873/acorn/-/acorn-6.4.0.tgz#b659d2ffbafa24baf5db1cdbb2c94a983ecd2784"
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.1.tgz#531e58ba3f51b9dacb9a6646ca4debf5b14ca474"
 
 ajv-errors@^1.0.0:
   version "1.0.1"