diff --git a/addons/prometheus/service.yaml b/addons/prometheus/service.yaml
index 50014e25..c1b9eecf 100644
--- a/addons/prometheus/service.yaml
+++ b/addons/prometheus/service.yaml
@@ -5,6 +5,7 @@ metadata:
   namespace: monitoring
   annotations:
     prometheus.io/scrape: 'true'
+    prometheus.io/port: '9090'
 spec:
   type: ClusterIP
   selector: