diff --git a/Gemfile.lock b/Gemfile.lock
index fa4bcd6..8260706 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
     json_pure (1.8.0)
     multi_json (1.7.7)
     pg (0.21.0)
-    rack (1.6.8)
+    rack (1.6.12)
     rack-protection (1.5.0)
       rack
     sinatra (1.4.3)