diff --git a/samples/bluetooth/hci_uart/nrf5.conf b/samples/bluetooth/hci_uart/nrf5.conf
index f2c2ac51f4f..f8b88d11a76 100644
--- a/samples/bluetooth/hci_uart/nrf5.conf
+++ b/samples/bluetooth/hci_uart/nrf5.conf
@@ -5,7 +5,7 @@ CONFIG_GPIO=y
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
 CONFIG_UART_0_NRF_FLOW_CONTROL=y
-CONFIG_MAIN_STACK_SIZE=512
+CONFIG_MAIN_STACK_SIZE=1024
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=512
 CONFIG_BT=y
 CONFIG_BT_HCI_RAW=y