diff --git a/src/config.cpp b/src/config.cpp
index 3c1b46b..c9b6a76 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -79,6 +79,10 @@ void config_valid() {
         body->controller_mode = 2;
         printf("[Config] controller_mode is invalid\n");
     }
+    if (body->config_version != CONFIG_VERSION) {
+        body->config_version = CONFIG_VERSION;
+        printf("[Config] Warning: Config may breking change\n");
+    }
 }
 
 void config_load() {
diff --git a/src/config.h b/src/config.h
index 2add120..92a015a 100644
--- a/src/config.h
+++ b/src/config.h
@@ -8,7 +8,7 @@
 #include <cstdint>
 
 struct __attribute__((packed)) Config_body {
-    uint8_t config_version = 1; // Config Version
+    uint8_t config_version; // Config Version
     float haptics_gain; // [1.0,2.0]
     float speaker_volume; // [-100,0]
     uint8_t inactive_time; // [10,60] min