diff --git a/etc/conf.org b/etc/conf.org
index 2d7ed23..1220b39 100644
--- a/etc/conf.org
+++ b/etc/conf.org
@@ -1266,7 +1266,11 @@ Taskjuggler is provided by an external package that provides the command line to
 (require 'org-tj)
 
 ;; force org to listen to the ORDERED property
-(org-enforce-todo-dependencies t)
+(setq org-enforce-todo-dependencies t)
+
+(setq org-taskjuggler-valid-report-attributes
+      '(headline columns definitions timeformat hideresource
+                 hidetask loadunit sorttasks formats period header center))
 #+END_SRC
 ** gtd implementation
 *** overview