diff --git a/scripts/bundle b/scripts/bundle
index fe299cd..caa03e5 100755
--- a/scripts/bundle
+++ b/scripts/bundle
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 set -e
 
diff --git a/scripts/prepare-tests b/scripts/prepare-tests
index c08093f..6f62634 100755
--- a/scripts/prepare-tests
+++ b/scripts/prepare-tests
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 set -e