diff --git a/justfile b/justfile
index 601941c1..e4cd73df 100644
--- a/justfile
+++ b/justfile
@@ -8,7 +8,8 @@ _docker_push tag:
     docker push {{tag}}
 
 _docker_build dockerfile tag force="0":
-    #!/usr/bin/env sh
+    #!/usr/bin/env bash
+    set -euo pipefail
     if [ "{{force}}" = "0" ]; then
         docker images --format '{''{.Repository}}' | grep '^{{tag}}$'
         if [ $? -eq 0 ]; then