diff --git a/Gemfile.lock b/Gemfile.lock
index c907335..107bbc0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,7 @@ GEM
     omniauth-twitter (1.4.0)
       omniauth-oauth (~> 1.1)
       rack
-    rack (2.0.6)
+    rack (2.1.1)
     rack-protection (2.0.5)
       rack
     sinatra (2.0.5)