diff --git a/portproton/preinstall.sh b/portproton/preinstall.sh
index eea3b23..b68795e 100644
--- a/portproton/preinstall.sh
+++ b/portproton/preinstall.sh
@@ -1,9 +1,10 @@
-	if grep -q ID=debian "/etc/os-release"; then
-		sudo dpkg --add-architecture i386
-		sudo apt-get install libvulkan1:i386 libgl1:i386
-		sudo apt-get update
-	elif grep -q ID=fedora "/etc/os-release"; then
-		sudo dnf install https://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm
-		sudo dnf update
-		sudo dnf upgrade --refresh
-	fi
\ No newline at end of file
+#!/bin/sh
+if grep -q ID=debian "/etc/os-release"; then
+	sudo dpkg --add-architecture i386
+	sudo apt-get install libvulkan1:i386 libgl1:i386
+	sudo apt-get update
+elif grep -q ID=fedora "/etc/os-release"; then
+	sudo dnf install https://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm
+	sudo dnf update
+	sudo dnf upgrade --refresh
+fi
\ No newline at end of file