diff --git a/compose.yaml b/compose.yaml
index 7b579a0..bdacd6d 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -17,7 +17,7 @@ services:
       SMTP_HOST: live.smtp.mailtrap.io
       SMTP_FROM: admin@doeringer.eu
       SMTP_FROM_NAME: Contact Tobias
-      SMTP_SECURITY: STARTTLS 
+      SMTP_SECURITY: starttls 
       SMTP_PORT: 587
       SMTP_USERNAME: smtp@mailtrap.io
       SMTP_PASSWORD: f2149ea35ddb1c5f622f8253550e55e1