diff --git a/services/MediaTranscriber.php b/services/MediaTranscriber.php
index 7f346c4..c416d09 100644
--- a/services/MediaTranscriber.php
+++ b/services/MediaTranscriber.php
@@ -88,7 +88,10 @@ class MediaTranscriber
             $ch = curl_init($whisperUrl);
             $opts = [
                 CURLOPT_POST           => true,
-                CURLOPT_POSTFIELDS     => ['audio_file' => new CURLFile($tmpFile, $mime, 'audio.' . $ext)],
+                CURLOPT_POSTFIELDS     => [
+                    'audio_file'      => new CURLFile($tmpFile, $mime, 'audio.' . $ext),
+                    'response_format' => 'json',
+                ],
                 CURLOPT_RETURNTRANSFER => true,
                 CURLOPT_TIMEOUT        => 120,
             ];