diff --git a/debian/postinst b/debian/postinst
index 0063a9b..7a2f1e5 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -1,5 +1,9 @@
 #!/bin/sh
 
+set -e
+
 if [ ! -x /usr/bin/rpi-imager ]; then
     chmod +x /usr/bin/rpi-imager
-fi
\ No newline at end of file
+fi
+
+#DEBHELPER#
\ No newline at end of file