diff --git a/Gemfile.lock b/Gemfile.lock
index 79f3b25..e3a2418 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
     public_suffix (3.0.3)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
-    rack (2.2.2)
+    rack (2.2.6.2)
     rake (12.3.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)