From 5d4032edf4289685af973363fa9482f5e6ddc488 Mon Sep 17 00:00:00 2001
From: "Quentin McGaw (desktop)" <quentin.mcgaw@gmail.com>
Date: Wed, 9 Feb 2022 12:33:24 +0000
Subject: [PATCH] fix(env): accept uppercase `OPENVPN_PROTOCOL`

---
 internal/configuration/sources/env/openvpnselection.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/internal/configuration/sources/env/openvpnselection.go b/internal/configuration/sources/env/openvpnselection.go
index a852f41d..4b59dd12 100644
--- a/internal/configuration/sources/env/openvpnselection.go
+++ b/internal/configuration/sources/env/openvpnselection.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
@@ -37,7 +38,7 @@ var ErrOpenVPNProtocolNotValid = errors.New("OpenVPN protocol is not valid")
 func (r *Reader) readOpenVPNProtocol() (tcp *bool, err error) {
 	envKey, protocol := r.getEnvWithRetro("OPENVPN_PROTOCOL", "PROTOCOL")
 
-	switch protocol {
+	switch strings.ToLower(protocol) {
 	case "":
 		return nil, nil //nolint:nilnil
 	case constants.UDP: