diff --git a/screendumpLowFrame/layout/DEBIAN/postinst b/screendumpLowFrame/layout/DEBIAN/postinst
index 27a41e9..b39d767 100644
--- a/screendumpLowFrame/layout/DEBIAN/postinst
+++ b/screendumpLowFrame/layout/DEBIAN/postinst
@@ -1,6 +1,6 @@
-#!/bin/bash
+#!/bin/sh
 
 launchctl unload //Library/LaunchDaemons/com.julioverne.screendumpd.plist
 launchctl load //Library/LaunchDaemons/com.julioverne.screendumpd.plist
 
-exit 0;
\ No newline at end of file
+exit 0;