diff --git a/tokio-native-tls/scripts/generate-certificate.sh b/tokio-native-tls/scripts/generate-certificate.sh
index e797eac..c3832b8 100755
--- a/tokio-native-tls/scripts/generate-certificate.sh
+++ b/tokio-native-tls/scripts/generate-certificate.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 set -e
 
 cd $1