diff --git a/Gemfile.lock b/Gemfile.lock
index 191d801b..273546b8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -127,6 +127,8 @@ GEM
       aws_cf_signer
       rest-client
     cocoon (1.2.15)
+    codecov (0.5.0)
+      simplecov (>= 0.15, < 0.22)
     coderay (1.1.1)
     concurrent-ruby (1.1.8)
     countable-rails (0.0.1)