diff --git a/.env-example b/.env-example
index 332f0d4..2b4b511 100644
--- a/.env-example
+++ b/.env-example
@@ -1,4 +1,9 @@
 # API key for chatgpt
 CHATGPT_KEY=api key for chatgpt
+# Chat gpt model
+CHATGPT_MODEL=gpt-4o
 # This is secret key for jwt signature
 JWT_SECRET=just a random string here
+# Set to false to disable registration
+ALLOW_REGISTER=true
+
diff --git a/backend/config/config.go b/backend/config/config.go
index 91e7963..3864ea8 100644
--- a/backend/config/config.go
+++ b/backend/config/config.go
@@ -1,6 +1,9 @@
 package config
 
-import "os"
+import (
+	"log"
+	"os"
+)
 
 func defaultValue(val string, def string) string {
 	if val == "" {
@@ -20,4 +23,8 @@ func LoadEnv() {
 	Env["JWT_SECRET"] = defaultValue(os.Getenv("JWT_SECRET"), "just a random string here")
 	Env["Environment"] = defaultValue(os.Getenv("Environment"), "dev")
 	Env["CHATGPT_KEY"] = defaultValue(os.Getenv("CHATGPT_KEY"), "")
+	Env["REGISTER"] = defaultValue(os.Getenv("ALLOW_REGISTER"), "true")
+	log.Printf("[INFO] Register set to '%s'\n", Env["REGISTER"])
+	Env["CHATGPT_MODEL"] = defaultValue(os.Getenv("CHATGPT_MODEL"), "gpt-4o")
+	log.Printf("[INFO] ChatGPT model set to '%s'\n", Env["CHATGPT_MODEL"])
 }
diff --git a/backend/controllers/user/user.go b/backend/controllers/user/user.go
index d1b8e15..bec5300 100644
--- a/backend/controllers/user/user.go
+++ b/backend/controllers/user/user.go
@@ -25,6 +25,12 @@ type RegisterForm struct {
 }
 
 func Register(c *gin.Context) {
+	// Check for register environment
+	if config.Env["REGISTER"] != "true" {
+		res.Error(c, "Registration is disabled", http.StatusForbidden)
+		return
+	}
+
 	// Receive data from frontend, check if data is okay, hash password, call model
 	var data RegisterForm
 	if err := c.ShouldBindJSON(&data); err != nil {
diff --git a/backend/utils/chatgpt/chatgpt.go b/backend/utils/chatgpt/chatgpt.go
index 3d102d3..431e636 100644
--- a/backend/utils/chatgpt/chatgpt.go
+++ b/backend/utils/chatgpt/chatgpt.go
@@ -37,7 +37,7 @@ func GenerateCoverLetter(templateHTML string, jobHTML string) (GeneratedCover, e
 	}
 
 	payload := ChatRequest{
-		Model:          "gpt-4o", // o4-mini
+		Model:          config.Env["CHATGPT_MODEL"],
 		ResponseFormat: &ResponseFormat{Type: "json_object"},
 		Messages: []ChatMessage{
 			{
diff --git a/production.yml b/production.yml
index 699aff8..04627e0 100644
--- a/production.yml
+++ b/production.yml
@@ -30,7 +30,7 @@ services:
     container_name: cover-letter-frontend
 
     ports:
-      - 80:8080
+      - 8000:8080
     networks:
       - cover-letter-network
   db: