diff --git a/workflow/engine/templates/cases/casesDocuments.js b/workflow/engine/templates/cases/casesDocuments.js
index dd83f42d0..f87ee1a85 100755
--- a/workflow/engine/templates/cases/casesDocuments.js
+++ b/workflow/engine/templates/cases/casesDocuments.js
@@ -284,6 +284,8 @@ function openActionDialog(caller, action, dataAux)
     return false;
   }
 
+  Ext.Ajax.timeout = 300000;
+
   switch( action ) {
     case 'copyAction':
     case 'edit':