diff --git a/entrypoint.sh b/entrypoint.sh
index e32fa2c..b059028 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -5,7 +5,7 @@ set -Eeuo pipefail
 section() {
     printf '\n==================================================\n'
     printf '%s\n' "$1"
-    printf '--------------------------------------------------\n'
+    printf -- '--------------------------------------------------\n'
 }
 
 require_value() {