diff --git a/webapp/ruby/Gemfile.lock b/webapp/ruby/Gemfile.lock
index 2d5f34f3d..14290f5fc 100644
--- a/webapp/ruby/Gemfile.lock
+++ b/webapp/ruby/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     mysql2 (0.5.6)
-    rack (3.1.7)
+    rack (3.1.8)
     rack-flash3 (1.0.5)
       rack
     rack-protection (4.0.0)