diff --git a/examples/grafana-datasource.yml b/examples/grafana-datasource.yml
index 8a20526..f6faf76 100644
--- a/examples/grafana-datasource.yml
+++ b/examples/grafana-datasource.yml
@@ -3,4 +3,4 @@ apiVersion: 1
 datasources:
   - name: Prometheus
     type: prometheus
-    url: prometheus:9090
\ No newline at end of file
+    url: http://prometheus:9090