diff --git a/src/main.cpp b/src/main.cpp
index dae6a46..4c3675e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -41,7 +41,7 @@ uint32_t bytesUdpToUart = 0;
 unsigned long lastStatsTime = 0;
 
 // ── Buffer UART → UDP ────────────────────────────────────
-#define UART_BUF_SIZE   512
+#define UART_BUF_SIZE   64
 #define UART_FLUSH_MS   3
 uint8_t uartBuf[UART_BUF_SIZE];
 int uartBufLen = 0;