diff --git a/prometheus/values.yaml b/prometheus/values.yaml
index 9fe5713fb..28ed48700 100644
--- a/prometheus/values.yaml
+++ b/prometheus/values.yaml
@@ -204,6 +204,9 @@ network:
         cluster: "nginx-cluster"
       annotations:
         nginx.ingress.kubernetes.io/rewrite-target: /
+        nginx.ingress.kubernetes.io/affinity: cookie
+        nginx.ingress.kubernetes.io/session-cookie-name: kube-ingress-session-prometheus
+        nginx.ingress.kubernetes.io/session-cookie-hash: sha1
     node_port:
       enabled: false
       port: 30900