diff --git a/workflow/engine/templates/cases/casesDocuments.js b/workflow/engine/templates/cases/casesDocuments.js
index 7c9b946de..ee7b5e7d7 100755
--- a/workflow/engine/templates/cases/casesDocuments.js
+++ b/workflow/engine/templates/cases/casesDocuments.js
@@ -285,6 +285,8 @@ function openActionDialog(caller, action, dataAux)
     return false;
   }
 
+  Ext.Ajax.timeout = 300000;
+
   switch( action ) {
     case 'copyAction':
     case 'edit':