diff --git a/platforms/nuttx/nuttx-configs/nxphlite-v3/nsh/defconfig b/platforms/nuttx/nuttx-configs/nxphlite-v3/nsh/defconfig
index 8929130a4ea..0032c48d165 100644
--- a/platforms/nuttx/nuttx-configs/nxphlite-v3/nsh/defconfig
+++ b/platforms/nuttx/nuttx-configs/nxphlite-v3/nsh/defconfig
@@ -759,8 +759,8 @@ CONFIG_UART2_2STOP=0
 #
 # UART4 Configuration
 #
-CONFIG_UART4_RXBUFSIZE=300
-CONFIG_UART4_TXBUFSIZE=300
+CONFIG_UART4_RXBUFSIZE=600
+CONFIG_UART4_TXBUFSIZE=1100
 CONFIG_UART4_BAUD=57600
 CONFIG_UART4_BITS=8
 CONFIG_UART4_PARITY=0