diff --git a/ubuntu/prometheus.sickstack.com.yml b/ubuntu/prometheus.sickstack.com.yml
index 4f06f0e..d4c75c8 100644
--- a/ubuntu/prometheus.sickstack.com.yml
+++ b/ubuntu/prometheus.sickstack.com.yml
@@ -22,6 +22,8 @@
   roles:
     - cloudalchemy.grafana
   vars:
+    grafana_server:
+      - http_addr: "127.0.0.1"
     grafana_datasources:
       - name: prometheus
         type: prometheus
@@ -70,7 +72,7 @@
         - gzip_http_version 1.1
         - gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript
       upstream:
-        - upstream grafana { server localhost:3000; keepalive 1024; }
+        - upstream grafana { server 127.0.0.1:3000; keepalive 1024; }
       ssl:
         - ssl_protocols TLSv1.2
         - ssl_session_timeout 1d