diff --git a/RBcore/client_setting.c b/RBcore/client_setting.c
index 82c3f4f..60110ad 100644
--- a/RBcore/client_setting.c
+++ b/RBcore/client_setting.c
@@ -149,7 +149,7 @@ void SendIV_Init(void)
     const osThreadAttr_t Send_PV_attributes = {
 		.name = MODULE_NAME_SENDIV,
 		.stack_size = 1024,
-		.priority = (osPriority_t) osPriorityHigh4,
+		.priority = (osPriority_t) osPriorityRealtime1,
 	};
 	(void)osThreadNew(Send_IV, NULL, &Send_PV_attributes);
 }
diff --git a/RBcore/drv_interface.c b/RBcore/drv_interface.c
index 03fdbf1..1c64b89 100644
--- a/RBcore/drv_interface.c
+++ b/RBcore/drv_interface.c
@@ -267,7 +267,7 @@ void Drv_InterfaceInit(void)
 	const osThreadAttr_t Custom_attributes = {
 		.name = MODULE_NAME_CUSTOM,
 		.stack_size = 2 * 1024,
-		.priority = (osPriority_t) osPriorityRealtime,
+		.priority = (osPriority_t) osPriorityRealtime1,
 	};
 	(void)osThreadNew(Custom_Task, NULL, &Custom_attributes);
 
@@ -275,7 +275,7 @@ void Drv_InterfaceInit(void)
 	const osThreadAttr_t motor_task_attributes = {
 		.name = MODULE_NAME_MOTOR,
 		.stack_size = 1024,
-		.priority = (osPriority_t) osPriorityRealtime,
+		.priority = (osPriority_t) osPriorityRealtime1,
 	};
 	(void)osThreadNew(MotorTask, NULL, &motor_task_attributes);
 
@@ -288,7 +288,7 @@ void Drv_InterfaceInit(void)
     const osThreadAttr_t MK32_Task_attributes = {
         .name = "Read_MK32",
         .stack_size = 2048,
-        .priority = (osPriority_t) osPriorityHigh6,
+        .priority = (osPriority_t) osPriorityRealtime1,
     };
     (void)osThreadNew(Read_MK32, NULL, &MK32_Task_attributes);
 
@@ -300,7 +300,7 @@ void Drv_InterfaceInit(void)
 	const osThreadAttr_t Read_PV_attributes = {
 		.name = "Read_PV",
 		.stack_size = 2048,
-		.priority = (osPriority_t) osPriorityHigh6,
+		.priority = (osPriority_t) osPriorityRealtime1,
 	};
 	(void)osThreadNew(Read_PV, NULL, &Read_PV_attributes);
 }