diff --git a/charts/actions-runner-controller/README.md b/charts/actions-runner-controller/README.md
index 696dcd21..3b3a6dce 100644
--- a/charts/actions-runner-controller/README.md
+++ b/charts/actions-runner-controller/README.md
@@ -55,7 +55,7 @@ All additional docs are kept in the `docs/` folder, this README is solely for do
 | `tolerations`                                            | Set the controller pod tolerations                                                                                         |                                                                      |
 | `env`                                                    | Set environment variables for the controller container                                                                     |                                                                      |
 | `priorityClassName`                                      | Set the controller pod priorityClassName                                                                                   |                                                                      |
-| `scope.watchNamespace`                                   | Tells the controller which namespace to watch if `scope.singleNamespace` is true                                           |                                                                      |
+| `scope.watchNamespace`                                   | Tells the controller and the github webhook server which namespace to watch if `scope.singleNamespace` is true             | `Release.Namespace` (the default namespace of the helm chart).       |
 | `scope.singleNamespace`                                  | Limit the controller to watch a single namespace                                                                           | false                                                                |
 | `githubWebhookServer.logLevel`                           | Set the log level of the githubWebhookServer container                                                                     |                                                                      |
 | `githubWebhookServer.replicaCount`                       | Set the number of webhook server pods                                                                                      | 1                                                                    |
diff --git a/charts/actions-runner-controller/templates/githubwebhook.deployment.yaml b/charts/actions-runner-controller/templates/githubwebhook.deployment.yaml
index e88e8c54..008aa842 100644
--- a/charts/actions-runner-controller/templates/githubwebhook.deployment.yaml
+++ b/charts/actions-runner-controller/templates/githubwebhook.deployment.yaml
@@ -42,6 +42,9 @@ spec:
         {{- if .Values.githubWebhookServer.logLevel }}
         - "--log-level={{ .Values.githubWebhookServer.logLevel }}"
         {{- end }}
+        {{- if .Values.scope.singleNamespace }}
+        - "--watch-namespace={{ default .Release.Namespace .Values.scope.watchNamespace }}"
+        {{- end }}
         command:
         - "/github-webhook-server"
         env: