diff --git a/manifests/common/app.yaml b/manifests/common/app.yaml
index e7bb7cc..b944d9e 100644
--- a/manifests/common/app.yaml
+++ b/manifests/common/app.yaml
@@ -5,6 +5,7 @@ metadata:
   name: app
   annotations:
     cert-manager.io/cluster-issuer: letsencrypt-prod
+    nginx.ingress.kubernetes.io/affinity: cookie
 spec:
   ingressClassName: nginx
   tls: