diff --git a/Gemfile.lock b/Gemfile.lock
index e3799d8..10a3184 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -159,7 +159,7 @@ GEM
       activesupport (= 4.2.5)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rainbow (2.0.0)
+    rainbow (2.1.0)
     rake (10.5.0)
     remotipart (1.2.1)
     responders (2.1.1)