diff --git a/.gitignore b/.gitignore
index 8745935..3035107 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ build/
 vendor/
 pages
 certs.sqlite
+.bash_history
diff --git a/cmd/flags.go b/cmd/flags.go
index a91c24c..5bc638b 100644
--- a/cmd/flags.go
+++ b/cmd/flags.go
@@ -89,17 +89,17 @@ var (
 			EnvVars: []string{"HOST"},
 			Value:   "[::]",
 		},
-		&cli.StringFlag{
+		&cli.UintFlag{
 			Name:    "port",
 			Usage:   "specifies the https port to listen to ssl requests",
 			EnvVars: []string{"PORT", "HTTPS_PORT"},
-			Value:   "443",
+			Value:   443,
 		},
-		&cli.StringFlag{
+		&cli.UintFlag{
 			Name:    "http-port",
 			Usage:   "specifies the http port, you also have to enable http server via ENABLE_HTTP_SERVER=true",
 			EnvVars: []string{"HTTP_PORT"},
-			Value:   "80",
+			Value:   80,
 		},
 		&cli.BoolFlag{
 			Name:    "enable-http-server",
diff --git a/cmd/main.go b/cmd/main.go
index 5356c35..8a65d43 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -47,10 +47,10 @@ func Serve(ctx *cli.Context) error {
 	rawDomain := ctx.String("raw-domain")
 	mainDomainSuffix := ctx.String("pages-domain")
 	rawInfoPage := ctx.String("raw-info-page")
-	listeningHost := fmt.Sprintf("%s:%s", ctx.String("host"), ctx.String("port"))
-	listeningSSLAddress := fmt.Sprintf("%s:%s", listeningHost, ctx.String("port"))
+	listeningHost := ctx.String("host")
+	listeningSSLAddress := fmt.Sprintf("%s:%d", listeningHost, ctx.Uint("port"))
+	listeningHTTPAddress := fmt.Sprintf("%s:%d", listeningHost, ctx.Uint("http-port"))
 	enableHTTPServer := ctx.Bool("enable-http-server")
-	listeningHTTPAddress := fmt.Sprintf("%s:%s", listeningHost, ctx.String("http-port"))
 
 	allowedCorsDomains := AllowedCorsDomains
 	if rawDomain != "" {