diff --git a/FdsKey/Core/Inc/main.h b/FdsKey/Core/Inc/main.h
index 80303df..ece1186 100644
--- a/FdsKey/Core/Inc/main.h
+++ b/FdsKey/Core/Inc/main.h
@@ -47,7 +47,7 @@ extern "C" {
 /* USER CODE BEGIN EM */
 #define FDSKEY_VERION_MAJOR 1
 #define FDSKEY_VERION_MINOR 1
-#define FDSKEY_VERION_SUFFIX 0
+#define FDSKEY_VERION_SUFFIX 'b'
 /* USER CODE END EM */
 
 void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);