diff --git a/cmd/main.go b/cmd/main.go
index 66fc405..0189906 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -21,7 +21,7 @@ func main() {
 		_, _ = w.Write([]byte(`{"status":"ok"}`))
 		w.WriteHeader(http.StatusOK)
 	}))
-	proxy := pkg.NewReverseProxy(cfg.OriginScheme, cfg.OriginBaseDomain, cfg.DefaultSubDomain, cfg.FeatureHeader)
+	proxy := pkg.NewReverseProxy(cfg.OriginScheme, cfg.OriginBaseDomain, cfg.DefaultSubDomain, cfg.FeatureHeader, cfg.ProxyPort)
 	http.Handle("/", proxy)
 	listenHost := fmt.Sprintf(":%v", port)
 	slog.Info("Listen on", "host", listenHost)
diff --git a/pkg/config.go b/pkg/config.go
index 8767b19..5af84b0 100644
--- a/pkg/config.go
+++ b/pkg/config.go
@@ -8,6 +8,7 @@ var c *Config
 
 type Config struct {
 	Port             int    `envconfig:"PORT" default:"18080"`
+	ProxyPort        int    `envconfig:"PORT" default:"443"`
 	OriginBaseDomain string `envconfig:"ORIGIN_BASE_DOMAIN"`
 	DefaultSubDomain string `envconfig:"DEFAULT_SUB_DOMAIN"`
 	FeatureHeader    string `envconfig:"FEATURE_HEADER" default:"X-Feature"`
diff --git a/pkg/proxy.go b/pkg/proxy.go
index 8b7ce60..8a045e9 100644
--- a/pkg/proxy.go
+++ b/pkg/proxy.go
@@ -6,6 +6,7 @@ import (
 	"log/slog"
 	"net"
 	"net/http"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -20,14 +21,14 @@ type ReverseProxy struct {
 	BaseDomain    string
 }
 
-func NewReverseProxy(schema string, baseDomain string, defaultSubdomain string, headerName string) *ReverseProxy {
+func NewReverseProxy(schema string, baseDomain string, defaultSubdomain string, headerName string, port int) *ReverseProxy {
 	director := func(req *http.Request) {
 		subDomain := req.Header.Get(headerName)
 		if subDomain == "" {
 			subDomain = defaultSubdomain
 		}
 		req.URL.Scheme = schema
-		req.URL.Host = subDomain + "." + baseDomain
+		req.URL.Host = subDomain + "." + baseDomain + ":" + strconv.Itoa(port)
 	}
 	return &ReverseProxy{Director: director, BaseDomain: baseDomain}
 }