diff --git a/README.md b/README.md
index b2fb87b..254d221 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ By default, gotty starts a web server at port 8080. Open the URL on your web bro
 --random-url, -r                                             Add a random string to the URL [$GOTTY_RANDOM_URL]
 --profile-file, -f "~/.gotty"                                Path to profile file [$GOTTY_PROFILE_FILE]
 --enable-tls, -t                                             Enable TLS/SSL [$GOTTY_ENABLE_TLS]
---tls-cert "~/.gotty.crt"                                    TLS/SSL cert [$GOTTY_TLS_CERT]
+--tls-crt "~/.gotty.crt"                                    TLS/SSL cert [$GOTTY_TLS_CRT]
 --tls-key "~/.gotty.key"                                     TLS/SSL key [$GOTTY_TLS_KEY]
 --title-format "GoTTY - {{ .Command }} ({{ .Hostname }})"    Title format of browser window [$GOTTY_TITLE_FORMAT]
 --auto-reconnect "-1"                                        Seconds to automatically reconnect to the server when the connection is closed (default: disabled) [$GOTTY_AUTO_RECONNECT]
@@ -84,7 +84,7 @@ By default, gotty doesn't allow clients to send any keystrokes or commands excep
 
 To restrict client access, you can use the `-c` option to enable the basic authentication. With option, clients need to input the specified username and passwords to connect to the gotty server. The `-r` option is a little bit casualer way to restrict access. With this option, gotty generates a random URL so that only people who know the URL can get access to the server.
 
-All traffic between servers and clients are NOT encrypted by default. When you send secret information through gotty, we strongly recommend you use the `-t` option which enables TLS/SSL on the session. By default, gotty loads the cert and key files placed at `~/.gotty.cert` and `~/.gotty.key`. You can overwrite these file paths with the `--tls-cert` and `--tls-key` options. When you need to generate a self-signed certification file, you can use the `openssl` command.
+All traffic between servers and clients are NOT encrypted by default. When you send secret information through gotty, we strongly recommend you use the `-t` option which enables TLS/SSL on the session. By default, gotty loads the crt and key files placed at `~/.gotty.crt` and `~/.gotty.key`. You can overwrite these file paths with the `--tls-cert` and `--tls-key` options. When you need to generate a self-signed certification file, you can use the `openssl` command.
 
 ```sh
 openssl req -x509 -nodes -days 9999 -newkey rsa:2048 -keyout ~/.gotty.key -out ~/.gotty.crt
diff --git a/app/app.go b/app/app.go
index 6cd2f97..00f3d29 100644
--- a/app/app.go
+++ b/app/app.go
@@ -41,7 +41,7 @@ type Options struct {
 	RandomUrl     bool
 	ProfileFile   string
 	EnableTLS     bool
-	TLSCert       string
+	TLSCrt        string
 	TLSKey        string
 	TitleFormat   string
 	AutoReconnect int
@@ -51,7 +51,7 @@ type Options struct {
 
 const DefaultProfileFilePath = "~/.gotty"
 const DefaultTLSKeyPath = "~/.gotty.key"
-const DefaultTLSCertPath = "~/.gotty.crt"
+const DefaultTLSCrtPath = "~/.gotty.crt"
 
 func New(options Options) (*App, error) {
 	titleTemplate, err := template.New("title").Parse(options.TitleFormat)
@@ -168,8 +168,8 @@ func (app *App) Run() error {
 		&http.Server{Addr: endpoint, Handler: siteHandler},
 	)
 	if app.options.EnableTLS {
-		cert, key := app.loadTLSFiles()
-		err = app.server.ListenAndServeTLS(cert, key)
+		crt, key := app.loadTLSFiles()
+		err = app.server.ListenAndServeTLS(crt, key)
 	} else {
 		err = app.server.ListenAndServe()
 	}
@@ -182,10 +182,10 @@ func (app *App) Run() error {
 	return nil
 }
 
-func (app *App) loadTLSFiles() (cert string, key string) {
-	cert = app.options.TLSCert
-	if app.options.TLSCert == DefaultTLSCertPath {
-		cert = os.Getenv("HOME") + "/.gotty.crt"
+func (app *App) loadTLSFiles() (crt string, key string) {
+	crt = app.options.TLSCrt
+	if app.options.TLSCrt == DefaultTLSCrtPath {
+		crt = os.Getenv("HOME") + "/.gotty.crt"
 	}
 
 	key = app.options.TLSKey
diff --git a/main.go b/main.go
index 83be0af..ea7be67 100644
--- a/main.go
+++ b/main.go
@@ -57,10 +57,10 @@ func main() {
 			EnvVar: "GOTTY_ENABLE_TLS",
 		},
 		cli.StringFlag{
-			Name:   "tls-cert",
-			Value:  app.DefaultTLSCertPath,
-			Usage:  "TLS/SSL cert",
-			EnvVar: "GOTTY_TLS_CERT",
+			Name:   "tls-crt",
+			Value:  app.DefaultTLSCrtPath,
+			Usage:  "TLS/SSL crt",
+			EnvVar: "GOTTY_TLS_CRT",
 		},
 		cli.StringFlag{
 			Name:   "tls-key",