diff --git a/internal/initialize/config.go b/internal/initialize/config.go
index 9483d2c..a703d99 100644
--- a/internal/initialize/config.go
+++ b/internal/initialize/config.go
@@ -7,10 +7,10 @@ import (
 )
 
 type Config struct {
-	SmtpApiUrl   string `env:"SMTP_API_URL"`
-	SmtpApiKey   string `env:"SMTP_API_KEY"`
-	Frequency    int64  `env:"FREQUENCY"`
-	AdminHttpURL string `env:"ADMIN_HTTP_URL"`
+	SmtpApiUrl   string `env:"SMTP_API_URL,required"`
+	SmtpApiKey   string `env:"SMTP_API_KEY,required"`
+	Frequency    int64  `env:"FREQUENCY,required"`
+	AdminHttpURL string `env:"ADMIN_HTTP_URL,required"`
 }
 
 func LoadConfig() (*Config, error) {