diff --git a/.github/actions/opensearch/run.sh b/.github/actions/opensearch/run.sh
index c697be69c..c23da0c34 100755
--- a/.github/actions/opensearch/run.sh
+++ b/.github/actions/opensearch/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -euxo pipefail