diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cloudflared-tunnel-exits/http-exits.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cloudflared-tunnel-exits/http-exits.yaml
index 14b9218dc..0d4cec4bf 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cloudflared-tunnel-exits/http-exits.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/cloudflared-tunnel-exits/http-exits.yaml
@@ -94,6 +94,12 @@ spec:
           - name: phpmyadmin
             external-hostname: phpmyadmin.onp-k8s.admin.seichi.click
             internal-authority: "phpmyadmin.seichi-minecraft:80"
+
+          # Argo Eventsの管理画面。
+          # 今は特に何も表示してないのとSSOを入れるので認証は噛まさない。
+          - name: argo-events
+            external-hostname: argo-events.onp-k8s.admin.seichi.click
+            internal-authority: "argo-workflows-server.argo:2746"
   template:
     metadata:
       name: "cloudflared-tunnel-http-exit--{{name}}"