diff --git a/src/appointment.js b/src/appointment.js
index 8a7165b..0ba6739 100644
--- a/src/appointment.js
+++ b/src/appointment.js
@@ -188,6 +188,7 @@ async function startBookWithNumbers(startNumber, endNumber, selectedStore, pathT
                     let segmentNumber = listWithoutBlackContact.length / filteredDeviceList.length;
                     console.log("connected device number:" + filteredDeviceList.length)
                     console.log("segmentNumber:" + segmentNumber)
+                    listWithoutBlackContact = shuffle(listWithoutBlackContact)
                     for (let i = 0; i < filteredDeviceList.length; i++) {
                         let device = filteredDeviceList[i];
                         let port = startForwordingForDevice(device)