diff --git a/Gemfile.lock b/Gemfile.lock
index 0abedf8..dd4b336 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
       tilt (~> 1.4.1)
     padrino-support (0.13.1)
       activesupport (>= 3.1)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-livereload (0.3.16)
       rack
     rack-test (0.6.3)