diff --git a/Gemfile.lock b/Gemfile.lock
index 4f1f126..86ca773 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,7 +50,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    rack (2.2.3)
+    rack (3.0.4.2)
     rake (13.0.6)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)