diff --git a/confluent_osdeploy/ubuntu20.04-diskless/profiles/default/scripts/firstboot.sh b/confluent_osdeploy/ubuntu20.04-diskless/profiles/default/scripts/firstboot.sh
index 3f38cb44..68e212fd 100644
--- a/confluent_osdeploy/ubuntu20.04-diskless/profiles/default/scripts/firstboot.sh
+++ b/confluent_osdeploy/ubuntu20.04-diskless/profiles/default/scripts/firstboot.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # This script is executed on the first boot after install has
 # completed. It is best to edit the middle of the file as