diff --git a/xs_device_info.h b/xs_device_info.h
index 6348b40..367cccf 100644
--- a/xs_device_info.h
+++ b/xs_device_info.h
@@ -31,9 +31,9 @@
 #define DEVICE_INFO_START_ADD 0x080E0000  //
 
 typedef struct {
-  uint32_t year;
-  uint32_t weak;
-  uint32_t index;
+  uint8_t  year;
+  uint8_t  weak;
+  uint16_t index;
 } xs_device_info_t;
 
 xs_device_info_t* xs_device_info_get();