diff --git a/webapp/ruby/Gemfile.lock b/webapp/ruby/Gemfile.lock
index 0ecc6e583..044b7542b 100644
--- a/webapp/ruby/Gemfile.lock
+++ b/webapp/ruby/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     multi_json (1.15.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     rack (3.0.9)
     rack-flash3 (1.0.5)
       rack