diff --git a/k8s/README.md b/k8s/README.md
index fb2ce56..b3ae21e 100644
--- a/k8s/README.md
+++ b/k8s/README.md
@@ -459,7 +459,7 @@ Using the [mailu helm chart](https://github.com/Mailu/helm-charts/tree/master/ma
 helm repo add mailu https://mailu.github.io/helm-charts/
 helm repo update
 kubectl apply -f mailu/mailu.secret-key.secret.yml
-helm upgrade --install mailu mailu/mailu -n mailu -f mailu/mailu.secret.yml
+helm upgrade --install mailu mailu/mailu -n mailu -f mailu/mailu.secret.yml --version 0.3.5
 #helm upgrade --install mailu ../../mailu-helm-charts/mailu/ -n mailu -f mailu/mailu.secret.yml
 helm template mailu mailu/mailu -n mailu -f mailu/mailu.secret.yml
 #helm template mailu ../../mailu-helm-charts/mailu/ -n mailu -f mailu/mailu.secret.yml