diff --git a/docker_assets/nginx.conf b/docker_assets/nginx.conf
index 75014784..f1c0c429 100644
--- a/docker_assets/nginx.conf
+++ b/docker_assets/nginx.conf
@@ -30,6 +30,7 @@ server {
         alias /youtube/;
         types {
             video/mp4 mp4;
+            text/vtt vtt;
         }
     }
     
diff --git a/frontend/src/components/GoogleCast.tsx b/frontend/src/components/GoogleCast.tsx
index e7eb36cd..7df0c0d8 100644
--- a/frontend/src/components/GoogleCast.tsx
+++ b/frontend/src/components/GoogleCast.tsx
@@ -165,7 +165,8 @@ const GoogleCast = ({ video, setRefresh, onWatchStateChanged }: GoogleCastProps)
       for (let i = 0; i < videoSubtitles.length; i++) {
         const subtitle = new chrome.cast.media.Track(i, chrome.cast.media.TrackType.TEXT);
 
-        subtitle.trackContentId = videoSubtitles[i].media_url;
+        // subtitle.trackContentId = videoSubtitles[i].media_url;
+        subtitle.trackContentId = `${getURL()}${videoSubtitles[i].media_url}`;
         subtitle.trackContentType = 'text/vtt';
         subtitle.subtype = chrome.cast.media.TextTrackType.SUBTITLES;
         subtitle.name = videoSubtitles[i].name;
@@ -188,6 +189,9 @@ const GoogleCast = ({ video, setRefresh, onWatchStateChanged }: GoogleCastProps)
     // request.queueData = new chrome.cast.media.QueueData(); // See https://developers.google.com/cast/docs/reference/web_sender/chrome.cast.media.QueueData for playlist support.
     request.currentTime = shiftCurrentTime(video?.player?.position); // Set video start position based on the browser video position
     // request.activeTrackIds = contentActiveSubtitle; // Set active subtitle based on video player
+    if (contentSubtitles.length > 0) {
+      request.activeTrackIds = [0];
+    }
 
     castSession.loadMedia(request).then(
       function () {