diff --git a/Gemfile.lock b/Gemfile.lock
index 6106875..263555c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -195,7 +195,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.3)
-    rack (2.0.8)
+    rack (2.1.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails-dom-testing (2.0.3)