diff --git a/roles/setup-http-site-proxy/templates/apache-docker-proxy-site.j2 b/roles/setup-http-site-proxy/templates/apache-docker-proxy-site.j2
index 18ab71e..43958bd 100644
--- a/roles/setup-http-site-proxy/templates/apache-docker-proxy-site.j2
+++ b/roles/setup-http-site-proxy/templates/apache-docker-proxy-site.j2
@@ -29,6 +29,6 @@
     SSLCertificateKeyFile /usr/local/etc/dehydrated/certs/{{ site_name }}/privkey.pem
     SSLCertificateChainFile /usr/local/etc/dehydrated/certs/{{ site_name }}/chain.pem
 
-    ProxyPass / http://localhost:{{proxy_port}}/
+    ProxyPass / http://{{ backend_host | default("localhost") }}:{{proxy_port}}/
 </VirtualHost>
 </IfFile>