diff --git a/docker-compose.yml b/docker-compose.yml
index 8fc8bda4..d55cb402 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5945,7 +5945,7 @@ services:
       SIGNOZ_ALERTMANAGER_SIGNOZ_GLOBAL_SMTP__SMARTHOST: postal-smtp:25
       SIGNOZ_ALERTMANAGER_SIGNOZ_GLOBAL_SMTP__AUTH__USERNAME: ${POSTAL_SMTP_AUTH_USER}
       SIGNOZ_ALERTMANAGER_SIGNOZ_GLOBAL_SMTP__AUTH__PASSWORD: ${POSTAL_SMTP_AUTH_PASSWORD}
-      SIGNOZ_ALERTMANAGER_SIGNOZ_GLOBAL_SMTP__REQUIRE__TLS: false
+      SIGNOZ_ALERTMANAGER_SIGNOZ_GLOBAL_SMTP__REQUIRE__TLS: true
       DASHBOARDS_PATH: /root/config/dashboards
       STORAGE: clickhouse
       GODEBUG: netdns=go