diff --git a/docs/advanced-usage.md b/docs/advanced-usage.md
index b34e552e..43d828d3 100644
--- a/docs/advanced-usage.md
+++ b/docs/advanced-usage.md
@@ -40,7 +40,7 @@ spec:
       ingressClassName: nginx
       annotations:
         nginx.ingress.kubernetes.io/ssl-passthrough: "true"
-        nginx.ingress.kubernetes.io/backend-protocol: "true"
+        nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
         nginx.ingress.kubernetes.io/ssl-redirect: "HTTPS"
   clusterCIDR: 10.42.0.0/16
   serviceCIDR: 10.43.0.0/16
@@ -129,4 +129,4 @@ You can check the [k3kcli documentation](./cli/k3kcli.md) for the full specs.
 
 * Using `--persistence-type ephemeral` will result in data loss if the nodes are restarted.
 
-* It is highly recommended to use `--persistence-type dynamic` with a configured storage class.
\ No newline at end of file
+* It is highly recommended to use `--persistence-type dynamic` with a configured storage class.