diff --git a/bosatsuj b/bosatsuj
index 5b947a60..3825e9bd 100755
--- a/bosatsuj
+++ b/bosatsuj
@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/bin/bash
+
+set -euo pipefail
 
 SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" &> /dev/null && pwd)
 # make sure to run sbt cli/assembly first