diff --git a/main/manager-api/src/main/java/xiaozhi/common/constant/Constant.java b/main/manager-api/src/main/java/xiaozhi/common/constant/Constant.java
index 52e840f4..b4b361ad 100644
--- a/main/manager-api/src/main/java/xiaozhi/common/constant/Constant.java
+++ b/main/manager-api/src/main/java/xiaozhi/common/constant/Constant.java
@@ -200,4 +200,9 @@ public interface Constant {
      * 版本号
      */
     public static final String VERSION = "0.4.3";
+
+    /**
+     * 无效固件URL
+     */
+    String INVALID_FIRMWARE_URL = "http://xiaozhi.server.com:8002/xiaozhi/otaMag/download/NOT_ACTIVATED_FIRMWARE_THIS_IS_A_INVALID_URL";
 }
\ No newline at end of file
diff --git a/main/manager-api/src/main/java/xiaozhi/modules/device/service/impl/DeviceServiceImpl.java b/main/manager-api/src/main/java/xiaozhi/modules/device/service/impl/DeviceServiceImpl.java
index 14ac3d61..ee31c41f 100644
--- a/main/manager-api/src/main/java/xiaozhi/modules/device/service/impl/DeviceServiceImpl.java
+++ b/main/manager-api/src/main/java/xiaozhi/modules/device/service/impl/DeviceServiceImpl.java
@@ -142,7 +142,7 @@ public class DeviceServiceImpl extends BaseServiceImpl<DeviceDao, DeviceEntity>
         if (deviceById == null) {
             DeviceReportRespDTO.Firmware firmware = new DeviceReportRespDTO.Firmware();
             firmware.setVersion(deviceReport.getApplication().getVersion());
-            firmware.setUrl("http://xiaozhi.server.com:8002/xiaozhi/otaMag/download/NOT_ACTIVATED_FIRMWARE_THIS_IS_A_INVALID_URL");
+            firmware.setUrl(Constant.INVALID_FIRMWARE_URL);
             response.setFirmware(firmware);
         } else {
             // 只有在设备已绑定且autoUpdate不为0的情况下才返回固件升级信息
@@ -378,7 +378,7 @@ public class DeviceServiceImpl extends BaseServiceImpl<DeviceDao, DeviceEntity>
         }
 
         firmware.setVersion(ota == null ? currentVersion : ota.getVersion());
-        firmware.setUrl(downloadUrl == null ? "" : downloadUrl);
+        firmware.setUrl(downloadUrl == null ? Constant.INVALID_FIRMWARE_URL : downloadUrl);
         return firmware;
     }