diff --git a/Gemfile.lock b/Gemfile.lock
index fa1b761..66e0885 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -78,7 +78,7 @@ GEM
     nokogiri (1.6.6.4)
       mini_portile (~> 0.6.0)
     pg (0.18.4)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.5)