diff --git a/Gemfile.lock b/Gemfile.lock
index 0ce37a3..33dca0b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     haml (4.0.3)
       tilt
-    rack (1.5.2)
+    rack (1.6.12)
     rack-protection (1.5.0)
       rack
     sass (3.2.9)