diff --git a/support/docker/production/.env b/support/docker/production/.env
index 346dd3d2d..635074a98 100644
--- a/support/docker/production/.env
+++ b/support/docker/production/.env
@@ -3,13 +3,13 @@ DB_PASSWORD=postgres_password
 PEERTUBE_WEBSERVER_HOSTNAME=my.domain.tld
 PEERTUBE_WEBSERVER_PORT=443
 PEERTUBE_WEBSERVER_HTTPS=true
-PEERTUBE_SMTP_USERNAME=null
-PEERTUBE_SMTP_PASSWORD=null
-PEERTUBE_SMTP_HOSTNAME=null
+PEERTUBE_SMTP_USERNAME=
+PEERTUBE_SMTP_PASSWORD=
+PEERTUBE_SMTP_HOSTNAME=
 PEERTUBE_SMTP_PORT=25
 PEERTUBE_SMTP_FROM=noreply@peertube.domain.tld
-PEERTUBE_SMTP_TLS="true"
+PEERTUBE_SMTP_TLS=true
 # /!\ Prefer to use the PeerTube admin interface to set the following configurations /!\
 #PEERTUBE_ADMIN_EMAIL=admin@domain.tld
-#PEERTUBE_SIGNUP_ENABLED="true"
-#PEERTUBE_TRANSCODING_ENABLED="true"
+#PEERTUBE_SIGNUP_ENABLED=true
+#PEERTUBE_TRANSCODING_ENABLED=true