diff --git a/README.md b/README.md
index 6c370fd..b38869f 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,7 @@
 Permanently free DeepL API written in Golang
 
 ## Description
-- `deeplx` in only run in port `1188`, later versions will do the specified port.
-- `deeplx` is listening to `0.0.0.0:1188` by default.
+- `deeplx` is listening to `0.0.0.0:1188` by default, you can change it to what you want.
 - `deeplx` is using `DeepL` Free API.
 - `deeplx` is unlimited to the number of requests.
 
@@ -83,6 +82,14 @@ systemctl daemon-reload
 systemctl enable deeplx
 
 ```
+
+### Configuration
+
+You can change the default configuration by setting environment variables, such as setting the port:
+```bash
+env DEEPLX_PORT=27001 deeplx_linux_amd64
+```
+
 ## Setup on [Bob App](https://bobtranslate.com/)
 1. Install [bob-plugin-deeplx](https://github.com/clubxdev/bob-plugin-deeplx) on Bob.
 
diff --git a/main.go b/main.go
index 4b9f048..5120b9f 100644
--- a/main.go
+++ b/main.go
@@ -8,6 +8,8 @@ import (
 	"log"
 	"math/rand"
 	"net/http"
+	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -90,6 +92,34 @@ func getTimeStamp(iCount int64) int64 {
 	}
 }
 
+const (
+	DEEPLXPORT = "DEEPLX_PORT"
+)
+
+type Config struct {
+	Port uint16
+}
+
+var DefaultConfig = Config{
+	Port: 1188,
+}
+
+func (config *Config) readConfig() {
+	portStr := os.Getenv(DEEPLXPORT)
+
+	if portStr == "" {
+		return
+	}
+
+	port, err := strconv.ParseUint(portStr, 10, 32)
+
+	if err != nil {
+		log.Printf("Unable to resolve %v, please give the correct port", DEEPLXPORT)
+	}
+
+	config.Port = uint16(port)
+}
+
 type ResData struct {
 	TransText  string `json:"text"`
 	SourceLang string `json:"source_lang"`
@@ -97,8 +127,14 @@ type ResData struct {
 }
 
 func main() {
+	// read user config
+	config := DefaultConfig
+	config.readConfig()
+
+	port := config.Port
+
 	// display information
-	fmt.Println("DeepL X has been successfully launched! Listening on 0.0.0.0:1188")
+	fmt.Printf("DeepL X has been successfully launched! Listening on 0.0.0.0:%v\n", port)
 	fmt.Println("Made by sjlleo and missuo.")
 
 	// create a random id
@@ -216,5 +252,5 @@ func main() {
 			}
 		}
 	})
-	r.Run(":1188") // listen and serve on 0.0.0.0:1188
+	r.Run(fmt.Sprintf(":%v", port)) //By default, listen and serve on 0.0.0.0:1188
 }