diff --git a/webapp/ruby/Gemfile.lock b/webapp/ruby/Gemfile.lock
index 2ab842a..fe08ef1 100644
--- a/webapp/ruby/Gemfile.lock
+++ b/webapp/ruby/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
     mysql2 (0.5.3)
     mysql2-cs-bind (0.0.7)
       mysql2
-    rack (2.2.3)
+    rack (2.2.8.1)
     rack-protection (2.0.8.1)
       rack
     raindrops (0.19.1)