diff --git a/yarn.lock b/yarn.lock
index a54f9da..eab977e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1502,8 +1502,8 @@ expect@^21.2.1:
     jest-regex-util "^21.2.0"
 
 extend@~3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.0.tgz#5a474353b9f3353ddd8176dfd37b91c83a46f1d4"
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
 
 external-editor@^2.0.4:
   version "2.1.0"