diff --git a/Gemfile.lock b/Gemfile.lock
index 10e45e4..a2c718d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,7 +53,7 @@ GEM
       multi_json (~> 1.0)
       ruby-hmac (~> 0.4.0)
       signature (~> 0.1.2)
-    rack (1.2.3)
+    rack (1.2.8)
     rack-mount (0.6.14)
       rack (>= 1.0.0)
     rack-test (0.5.7)