diff --git a/src/js/bootstrap-dialog.js b/src/js/bootstrap-dialog.js
index 2cbdcc4..138fc59 100644
--- a/src/js/bootstrap-dialog.js
+++ b/src/js/bootstrap-dialog.js
@@ -88,7 +88,7 @@
 
     BootstrapDialog.ICON_SPINNER = 'glyphicon glyphicon-asterisk';
 
-    BootstrapDialog.ZINDEX_BACKDROP = 1040;
+    BootstrapDialog.ZINDEX_BACKDROP = 0;
     BootstrapDialog.ZINDEX_MODAL = 1050;
 
     /**