diff --git a/README.md b/README.md
index ec394b84a..f02e18faa 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ The following table lists the configurable parameters of the Harbor chart and th
 | `expose.tls.certSource`                                               | The source of the TLS certificate. Set as `auto`, `secret` or `none` and fill the information in the corresponding section: 1) auto: generate the TLS certificate automatically 2) secret: read the TLS certificate from the specified secret. The TLS certificate can be generated manually or by cert manager 3) none: configure no TLS certificate for the ingress. If the default TLS certificate is configured in the ingress controller, choose this option | `auto`                                |
 | `expose.tls.auto.commonName`                                          | The common name used to generate the certificate, it's necessary when the type isn't `ingress`                                                                                                                                                                                                                                                                                                                                                                   |                                       |
 | `expose.tls.secret.secretName`                                        | The name of secret which contains keys named: `tls.crt` - the certificate; `tls.key` - the private key                                                                                                                                                                                                                                                                                                                                                           |                                       |
+| `expose.ingress.className`                                            | The ingress controller class to use.                                                                                                                                                                                                                                                                                                                                                                                                                             |  
 | `expose.ingress.hosts.core`                                           | The host of Harbor core service in ingress rule                                                                                                                                                                                                                                                                                                                                                                                                                  | `core.harbor.domain`                  |
 | `expose.ingress.controller`                                           | The ingress controller type. Currently supports `default`, `gce`, `alb`, `f5-bigip` and `ncp`                                                                                                                                                                                                                                                                                                                                                                    | `default`                             |
 | `expose.ingress.kubeVersionOverride`                                  | Allows the ability to override the kubernetes version used while templating the ingress                                                                                                                                                                                                                                                                                                                                                                          |                                       |