diff --git a/app/Gemfile.lock b/app/Gemfile.lock
index b74984d..2c92c25 100644
--- a/app/Gemfile.lock
+++ b/app/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
     mysql2 (0.5.2)
     pg (0.18.4)
     puma (3.12.1)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-protection (2.0.5)
       rack
     sequel (5.19.0)