diff --git a/workflow/engine/templates/installer/installer_cards.js b/workflow/engine/templates/installer/installer_cards.js
index 3b3844973..2b3eb17f6 100644
--- a/workflow/engine/templates/installer/installer_cards.js
+++ b/workflow/engine/templates/installer/installer_cards.js
@@ -633,7 +633,7 @@ Ext.onReady(function () {
                                         value: 'root',
                                         allowBlank: false,
                                         validator: function (v) {
-                                            var t = /^[.a-zA-Z_\-]+$/;
+                                            var t = /^[0-9\.a-zA-Z_\-]+$/;
                                             return t.test(v);
                                         },
                                         listeners: {