diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml
index eaf4cbfb..b17d043a 100644
--- a/config/manager/manager.yaml
+++ b/config/manager/manager.yaml
@@ -131,7 +131,7 @@ spec:
           - name: VALIDATING_WEBHOOK_NAME
             value: "subscription-validating-webhook-configuration"
           - name: EVENTING_WEBHOOK_AUTH_ENABLED
-            value: "false"
+            value: "true"
           - name: EVENTING_WEBHOOK_AUTH_SECRET_NAME
             value: "eventing-webhook-auth"
           - name: EVENTING_WEBHOOK_AUTH_SECRET_NAMESPACE