diff --git a/Gemfile.lock b/Gemfile.lock
index c6dcd293..fa84b44d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -67,7 +67,7 @@ GEM
       middleman-core (~> 3.0)
       rouge (~> 0.3.0)
     multi_json (1.7.8)
-    rack (1.5.2)
+    rack (1.6.12)
     rack-livereload (0.3.15)
       rack
     rack-protection (1.5.2)