diff --git a/openapi-app.json b/openapi-app.json
index a3ff212..19459fc 100644
--- a/openapi-app.json
+++ b/openapi-app.json
@@ -1173,7 +1173,7 @@
           },
           "download_url": {
             "description": "Short-lived URL for this exact attachment. Fetch it promptly; if it expires, call the message or attachment metadata endpoint again to receive a fresh URL.",
-            "example": "https://app.sendmux.ai/api/v1/mailbox/messages/msg_123/attachments/blob_123?download_token=...",
+            "example": "https://app.sendmux.ai/api/v1/mailbox/messages/msg_123/attachment-downloads/attref_abc123?download_token=...",
             "type": "string"
           },
           "filename": {