diff --git a/rails/Gemfile.lock b/rails/Gemfile.lock
index 6ce9722..f48ad56 100644
--- a/rails/Gemfile.lock
+++ b/rails/Gemfile.lock
@@ -165,7 +165,7 @@ GEM
       activerecord (>= 3.0)
     public_suffix (3.0.2)
     puma (3.11.3)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-pjax (1.0.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)