diff --git a/build-n-test.sh b/build-n-test.sh
index 96b40a2..f177150 100755
--- a/build-n-test.sh
+++ b/build-n-test.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 images=('alpine' 'debian')