diff --git a/data/s3.sh b/data/s3.sh
index 6c6c8fb1e..7b910b2f9 100755
--- a/data/s3.sh
+++ b/data/s3.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 mlr --opprint "$@" step -a rsum,delta,counter -f x,y -g a ../data/small
 echo
 mlr --opprint "$@" step -a rsum,delta,counter -f x,y ../data/small