diff --git a/yarn.lock b/yarn.lock
index 6a2cd93..59155d7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1111,8 +1111,8 @@ expect@^21.2.1:
     jest-regex-util "^21.2.0"
 
 extend@~3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
 
 external-editor@^2.0.4:
   version "2.0.4"