diff --git a/nuttx-configs/px4fmu-v2/nsh/defconfig b/nuttx-configs/px4fmu-v2/nsh/defconfig
index 8b551aa0e8..a688a1bf9b 100644
--- a/nuttx-configs/px4fmu-v2/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v2/nsh/defconfig
@@ -663,8 +663,8 @@ CONFIG_CDCACM_EPBULKIN_HSSIZE=512
 CONFIG_CDCACM_NWRREQS=4
 CONFIG_CDCACM_NRDREQS=4
 CONFIG_CDCACM_BULKIN_REQLEN=96
-CONFIG_CDCACM_RXBUFSIZE=512
-CONFIG_CDCACM_TXBUFSIZE=4096
+CONFIG_CDCACM_RXBUFSIZE=1000
+CONFIG_CDCACM_TXBUFSIZE=5000
 CONFIG_CDCACM_VENDORID=0x26ac
 CONFIG_CDCACM_PRODUCTID=0x0011
 CONFIG_CDCACM_VENDORSTR="3D Robotics"