diff --git a/script/sign.ps1 b/script/sign.ps1
index 54439c919..7ba5177a0 100644
--- a/script/sign.ps1
+++ b/script/sign.ps1
@@ -1,3 +1,5 @@
+#!/usr/bin/env pwsh
+
 if ($null -ne $env:DLIB_PATH) {
 	Write-Host "Skipping Windows code signing; DLIB_PATH not set"
 	exit