diff --git a/docker/4_run/install_scripts.sh b/docker/4_run/install_scripts.sh
index 75f776b..a59cc7d 100644
--- a/docker/4_run/install_scripts.sh
+++ b/docker/4_run/install_scripts.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 
 if [ -f /installed ]; then
     return