diff --git a/Gemfile.lock b/Gemfile.lock
index 0070969..b29935f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -98,7 +98,7 @@ GEM
       multi_json (~> 1.0)
       pusher-signature (~> 0.1.8)
     pusher-signature (0.1.8)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)