diff --git a/src/minimal_overlay/overlay_build.sh b/src/minimal_overlay/overlay_build.sh
index 750ea2a9c..1c0b0f009 100755
--- a/src/minimal_overlay/overlay_build.sh
+++ b/src/minimal_overlay/overlay_build.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 SRC_DIR=$(pwd)