diff --git a/include/LedMqttSubscriber.h b/include/LedMqttSubscriber.h
index 6859847..cbdc7b1 100644
--- a/include/LedMqttSubscriber.h
+++ b/include/LedMqttSubscriber.h
@@ -15,8 +15,8 @@ public:
     void disconnect(); // 断开连接
 
     // 让外部可以访问最新的 gear 和 speed
-    int getGear() const;
-    double getSpeed() const;
+    int getGear();
+    double getSpeed();
     void checkTimeout(std::chrono::seconds timeout);
 
 private:
diff --git a/src/LedMqttSubscriber.cpp b/src/LedMqttSubscriber.cpp
index 19197a4..003a476 100644
--- a/src/LedMqttSubscriber.cpp
+++ b/src/LedMqttSubscriber.cpp
@@ -128,13 +128,13 @@ void MqttClient::checkTimeout(std::chrono::seconds timeout)
     }
 }
 
-int MqttClient::getGear() const
+int MqttClient::getGear()
 {
     std::lock_guard<std::mutex> lock(dataMutex);
     return gear;
 }
 
-double MqttClient::getSpeed() const
+double MqttClient::getSpeed()
 {
     std::lock_guard<std::mutex> lock(dataMutex);
     return speed;