diff --git a/www/redmine50/files/commonmark.rb b/www/redmine50/files/commonmark.rb
new file mode 100644
index 000000000000..35124ebb51cb
--- /dev/null
+++ b/www/redmine50/files/commonmark.rb
@@ -0,0 +1,5 @@
+gem "redcarpet", '>= 3.5.1'
+gem "html-pipeline", ">= 2.13.2"
+gem "commonmarker", ">= 0.23.6"
+gem "sanitize", ">= 6.0"
+gem "deckar01-task_list", ">=2.3.1"