diff --git a/morss-helper b/morss-helper
index fdd42f3..a5778a2 100644
--- a/morss-helper
+++ b/morss-helper
@@ -1,4 +1,6 @@
 #! /bin/sh
+set -ex
+
 if ! command -v python && command -v python3 ; then
 	alias python='python3'
 fi