diff --git a/Gemfile.lock b/Gemfile.lock
index 1dff16f..dfea821 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
     racc (1.6.0)
-    rack (2.2.3.1)
+    rack (2.2.6.3)
     rake (12.3.3)
     rexml (3.2.5)
     yajl-ruby (1.4.3)