diff --git a/Gemfile.lock b/Gemfile.lock
index 84baf04..ca36263 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -93,7 +93,7 @@ GEM
     parslet (2.0.0)
     public_suffix (5.0.1)
     racc (1.7.1)
-    rack (2.2.6.4)
+    rack (2.2.9)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)