diff --git a/webapp/ruby/Gemfile.lock b/webapp/ruby/Gemfile.lock
index ea34192..c2f98e7 100644
--- a/webapp/ruby/Gemfile.lock
+++ b/webapp/ruby/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
     mysql2-cs-bind (0.0.7)
       mysql2
     puma (3.12.0)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-protection (2.0.3)
       rack
     sinatra (2.0.3)