diff --git a/overlay/hooks/entrypoint-pre.d/10_setup.sh b/overlay/hooks/entrypoint-pre.d/10_setup.sh
index 481ad40..f9a9d0e 100644
--- a/overlay/hooks/entrypoint-pre.d/10_setup.sh
+++ b/overlay/hooks/entrypoint-pre.d/10_setup.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 # Handle CACHE_MEM_SIZE deprecation