diff --git a/yarn.lock b/yarn.lock
index 1f78080..121c462 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1458,13 +1458,9 @@ expect@^21.2.1:
     jest-message-util "^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"
-
-extend@~3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
+extend@~3.0.0, extend@~3.0.1:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
 
 extglob@^0.3.1:
   version "0.3.2"