diff --git a/build/run.sh b/build/run.sh
index 1651419..d2a41cb 100755
--- a/build/run.sh
+++ b/build/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e
 
diff --git a/build/ubuntu/install-packages.sh b/build/ubuntu/install-packages.sh
index 80222ae..cea0d7e 100755
--- a/build/ubuntu/install-packages.sh
+++ b/build/ubuntu/install-packages.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e