diff --git a/src/lib/operationalWebhook/channelAdapters.ts b/src/lib/operationalWebhook/channelAdapters.ts
index ef2533c..e2880ee 100644
--- a/src/lib/operationalWebhook/channelAdapters.ts
+++ b/src/lib/operationalWebhook/channelAdapters.ts
@@ -25,9 +25,9 @@ export function operationalWebhookEventTitle(eventType: string): string {
 /** Infer Slack / Teams formatting from webhook URL host. */
 export function detectNotificationChannel(targetUrl: string): NotificationChannel {
   try {
-    const hostname = new URL(targetUrl).hostname.toLowerCase();
-    const matchesDomain = (domain: string) =>
-      hostname === domain || hostname.endsWith(`.${domain}`);
+    const host = new URL(targetUrl).hostname.toLowerCase().replace(/\.$/, "");
+    const matchesDomain = (domain: string): boolean =>
+      host === domain || host.endsWith(`.${domain}`);
 
     if (matchesDomain("hooks.slack.com") || matchesDomain("slack.com")) return "slack";
     if (