diff --git a/README.md b/README.md
index c7b5e462..5933e26b 100644
--- a/README.md
+++ b/README.md
@@ -28,10 +28,12 @@ Notes on local metrics collection:
 ```
 # create a storage volume for grafana (once)
 sudo docker volume create grafana-storage
+# create a storage volume for prometheus (once)
+sudo docker volume create prometheus-storage
 
 # run prometheus with the included config
-sudo docker run --network host -v /path/to/zebra/prometheus.yaml:/etc/prometheus/prometheus.yml  prom/prometheus
+sudo docker run --network host -v prometheus-storage:/prometheus -v /path/to/zebra/prometheus.yaml:/etc/prometheus/prometheus.yml  prom/prometheus
 
 # run grafana
 sudo docker run -d --network host -v grafana-storage:/var/lib/grafana grafana/grafana
-```
\ No newline at end of file
+```