diff --git a/stm-firmware/main.c b/stm-firmware/main.c
index eb127b0..e2c4f84 100644
--- a/stm-firmware/main.c
+++ b/stm-firmware/main.c
@@ -80,7 +80,7 @@ static inline void uart_gpio_config(void)
 }
 
 
-static char shell_uart_tx_buff[128];
+static char shell_uart_tx_buff[256];
 static char shell_uart_rx_buff[48];
 struct stm_uart shell_uart;