diff --git a/iflytop_canbus_protocol.hpp b/iflytop_canbus_protocol.hpp
index 9527703..f28572b 100644
--- a/iflytop_canbus_protocol.hpp
+++ b/iflytop_canbus_protocol.hpp
@@ -2,7 +2,7 @@
 #include <stdint.h>
 
 #define PROTOCOL_VERSION 1
-#define HEART_OVERTIME   (10 * 1000)
+#define HEART_OVERTIME   (30 * 1000)
 
 extern "C" {
 #pragma pack(1)