diff --git a/scripts/install-eza-debian.sh b/scripts/install-eza-debian.sh
index 818be2a..1e7bfe2 100755
--- a/scripts/install-eza-debian.sh
+++ b/scripts/install-eza-debian.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 sudo mkdir -p /etc/apt/keyrings
 wget -qO- https://raw.githubusercontent.com/eza-community/eza/main/deb.asc | sudo gpg --dearmor -o /etc/apt/keyrings/gierens.gpg
 echo "deb [signed-by=/etc/apt/keyrings/gierens.gpg] http://deb.gierens.de stable main" | sudo tee /etc/apt/sources.list.d/gierens.list