diff --git a/Gemfile.lock b/Gemfile.lock
index 836e3eb..19cb144 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,11 +10,11 @@ GEM
     mini_portile (0.6.1)
     nokogiri (1.6.5)
       mini_portile (~> 0.6.0)
-    rack (1.2.2)
+    rack (1.5.2)
     sinatra (1.2.6)
       rack (~> 1.1)
       tilt (>= 1.2.2, < 2.0)
-    tilt (1.3)
+    tilt (1.4.1)
 
 PLATFORMS
   ruby