diff --git a/Gemfile.lock b/Gemfile.lock
index 5e0d0b68..1be00558 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
     nokogiri (1.6.1)
       mini_portile (~> 0.5.0)
     pmap (1.0.1)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-test (0.6.2)
       rack (>= 1.0)
     rb-fsevent (0.9.3)