diff --git a/hack/prom_metric_linter.sh b/hack/prom_metric_linter.sh
index 679a7541..bfe87086 100755
--- a/hack/prom_metric_linter.sh
+++ b/hack/prom_metric_linter.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 set -e
 
 linter_image_tag="v0.0.3"