diff --git a/Gemfile.lock b/Gemfile.lock
index e580a38..e3249fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
       ast (~> 2.4.0)
     progress (3.5.2)
     public_suffix (4.0.3)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rainbow (3.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)