diff --git a/apps/web/src/lib/traffic-alert.ts b/apps/web/src/lib/traffic-alert.ts
index dc3e4a1..69aa508 100644
--- a/apps/web/src/lib/traffic-alert.ts
+++ b/apps/web/src/lib/traffic-alert.ts
@@ -121,27 +121,25 @@ async function resolveTelegramChatId(): Promise<string | undefined> {
   return resolveTelegramFallbackChatId();
 }
 
-function escapeMarkdown(value: unknown) {
+function escapeHtml(value: unknown) {
   if (value === null || value === undefined) return "";
-  return String(value)
-    .replace(/([_*[\]()~`>#+=|{}.!-])/g, "\\$1")
-    .replace(/\n/g, "\\n");
+  return String(value).replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
 }
 
 function buildTelegramMessage(event: TrafficAlertEvent) {
   return (
-    `*VibeWork 流量告警*` +
-    `\n- 平台: \`agent-bounty-protocol\`` +
-    `\n- 等級: \`${event.level}\`` +
-    `\n- 行為: \`${event.action}\`` +
-    `\n- 通道: \`${event.surface}\`` +
-    `\n- Actor: \`${event.actorType}/${event.actorId}\`` +
-    `\n- Source IP: \`${event.sourceIp || "n/a"}\`` +
-    `\n- User-Agent: \`${event.userAgent || "n/a"}\`` +
-    `\n- 回應: \`${typeof event.metadata?.response_status === "number" ? event.metadata.response_status : "n/a"}\`` +
-    `\n- 任務: \`${event.taskId || "n/a"}\`` +
-    `\n- request_id: \`${typeof event.metadata?.request_id === "string" ? event.metadata.request_id : "n/a"}\`` +
-    `\n- 訊息: ${escapeMarkdown(event.message)}`
+    `<b>VibeWork 流量告警</b>` +
+    `\n- 平台: <code>agent-bounty-protocol</code>` +
+    `\n- 等級: <code>${escapeHtml(event.level)}</code>` +
+    `\n- 行為: <code>${escapeHtml(event.action)}</code>` +
+    `\n- 通道: <code>${escapeHtml(event.surface)}</code>` +
+    `\n- Actor: <code>${escapeHtml(`${event.actorType}/${event.actorId}`)}</code>` +
+    `\n- Source IP: <code>${escapeHtml(event.sourceIp || "n/a")}</code>` +
+    `\n- User-Agent: <code>${escapeHtml(event.userAgent || "n/a")}</code>` +
+    `\n- 回應: <code>${escapeHtml(typeof event.metadata?.response_status === "number" ? event.metadata.response_status : "n/a")}</code>` +
+    `\n- 任務: <code>${escapeHtml(event.taskId || "n/a")}</code>` +
+    `\n- request_id: <code>${escapeHtml(typeof event.metadata?.request_id === "string" ? event.metadata.request_id : "n/a")}</code>` +
+    `\n- 訊息: <code>${escapeHtml(event.message)}</code>`
   );
 }
 
@@ -277,7 +275,7 @@ export async function sendTrafficAlert(event: TrafficAlertEvent): Promise<void>
         body: JSON.stringify({
           chat_id: resolvedTelegramChatId,
           text: buildTelegramMessage(event),
-          parse_mode: "MarkdownV2",
+          parse_mode: "HTML",
         }),
       },
     },