diff --git a/Gemfile.lock b/Gemfile.lock
index d9544ee..ef723bb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,9 +86,9 @@ GEM
     pygments.rb (0.5.0)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.4.1)
-    rack-contrib (1.1.0)
-      rack (>= 0.9.1)
+    rack (1.4.7)
+    rack-contrib (2.5.0)
+      rack (< 4)
     rack-livereload (0.3.13)
       rack
     rack-protection (1.3.2)