diff --git a/Gemfile.lock b/Gemfile.lock
index 38a2c2d..d462d72 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
       httpclient (~> 2.5)
       multi_json (~> 1.0)
       signature (~> 0.1.8)
-    rack (1.6.0)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     redis (3.2.1)