diff --git a/Gemfile.lock b/Gemfile.lock
index 64de5a8..d21ada3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -348,4 +348,4 @@ RUBY VERSION
    ruby 2.3.4p301
 
 BUNDLED WITH
-   1.15.3
+   1.15.4