diff --git a/src/main/java/com/isu/gaswellwatch/vo/command/Command.java b/src/main/java/com/isu/gaswellwatch/vo/command/Command.java
index 9dce5c1..ce3d701 100644
--- a/src/main/java/com/isu/gaswellwatch/vo/command/Command.java
+++ b/src/main/java/com/isu/gaswellwatch/vo/command/Command.java
@@ -102,7 +102,7 @@ public abstract class Command implements Serializable {
     @NotNull(message = "下发设备标识不能为空")
     private Long deviceId;
 
-    public Collection<ModbusCommandDto> buildModbusCommand() {
+    public final Collection<ModbusCommandDto> buildModbusCommand() {
         if (!this.validate()) {
             throw new InvalidParameterException("Invalid command");
         }