diff --git a/asciinema/compose.yaml b/asciinema/compose.yaml
index da1d9f2..1d913f5 100644
--- a/asciinema/compose.yaml
+++ b/asciinema/compose.yaml
@@ -17,7 +17,7 @@ services:
       SMTP_PASSWORD: ${EMAIL_SMTP_PASSWORD}
       SMTP_FROM_ADDRESS: ${EMAIL_FROM}
       SMTP_PORT: 587
-      SMTP_TLS: if_available
+      SMTP_TLS: never
       SIGN_UP_DISABLED: ${ASCIINEMA_SIGN_UP_DISABLED:-false}
       DEFAULT_AVATAR: gravatar
     labels: