diff --git a/roles/mastodon/templates/.env.production b/roles/mastodon/templates/.env.production
index 4684d85..7bc3c89 100644
--- a/roles/mastodon/templates/.env.production
+++ b/roles/mastodon/templates/.env.production
@@ -14,7 +14,7 @@ DB_PORT=5432
 {% if mastodon_config.enable_elasticsearch is defined %}
 # Optional ElasticSearch configuration
 # You may also set ES_PREFIX to share the same cluster between multiple Mastodon servers (falls back to REDIS_NAMESPACE if not set)
-ES_ENABLED={{ mastodon_config.enable_elasticsearch }}
+ES_ENABLED={{ mastodon_config.enable_elasticsearch | bool | lower }}
 ES_HOST=es
 ES_PORT=9200
 {% endif %}
@@ -57,7 +57,7 @@ VAPID_PUBLIC_KEY={{ mastodon_config.vapid_public_key }}
 # Registrations
 {% if mastodon_config.single_user_mode is defined %}
 # Single user mode will disable registrations and redirect frontpage to the first profile
-SINGLE_USER_MODE={{ mastodon_config.single_user_mode }}
+SINGLE_USER_MODE={{ mastodon_config.single_user_mode | bool | lower }}
 {% endif %}
 # Prevent registrations with following e-mail domains
 # EMAIL_DOMAIN_BLACKLIST=example1.com|example2.de|etc