diff --git a/charts/cf-runtime/.ci/image-digests.sh b/charts/cf-runtime/.ci/image-digests.sh
index e4dd3dc9..2961f34c 100755
--- a/charts/cf-runtime/.ci/image-digests.sh
+++ b/charts/cf-runtime/.ci/image-digests.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 set -eux
 MYDIR=$(dirname $0)
 REPO_ROOT="${MYDIR}/../../.."