diff --git a/rdrview.filter.dpi b/rdrview.filter.dpi
index f1a2f84..c05915b 100755
--- a/rdrview.filter.dpi
+++ b/rdrview.filter.dpi
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright (c) 2025 Rodrigo Arias Mallo
 # SPDX-License-Identifier: GPL-3.0-or-later