diff --git a/mail/docker-compose.yaml b/mail/docker-compose.yaml
index adc86bf..6da4300 100644
--- a/mail/docker-compose.yaml
+++ b/mail/docker-compose.yaml
@@ -4,7 +4,7 @@ services:
     container_name: mailserver
     # Provide the FQDN of your mail server here (Your DNS MX record should point to this value)
     hostname: mail.dmeiburg.de
-    environments:
+    environment:
       - SSL_TYPE=letsencrypt
       - VIRTUAL_HOST=mail.dmeiburg.de
       - LETSENCRYPT_HOST=mail.dmeiburg.de