diff --git a/www/conservancy/templates/supporter/index.html b/www/conservancy/templates/supporter/index.html
index 7bfa0ded30df33cebfb1ffe66466d427b134c7a7..30a6de8809e56f9c1e97898987e7dd3c5f377637 100644
--- a/www/conservancy/templates/supporter/index.html
+++ b/www/conservancy/templates/supporter/index.html
@@ -53,7 +53,8 @@
   a Sustainer:
 <p style="text-align:center;">
 <video style="width: 50%; height: auto;" controls="" poster="/videos/sfc-introduction-video_poster.jpg">
-<source src="/videos/sfc-introduction_1080p.mp4">
+<source src="/videos/sfc-introduction_1080p.mp4" />
+<track src="/videos/sfc-introduction_1080p..vtt" kind="subtitles" srclang="en" label="English" />
 <a href="/videos/sfc-introduction_1080p.mp4"><img src="/videos/sfc-introduction-video_poster.jpg"
                                                   alt="Software Freedom Conservancy introduction video"></a><br/>
 <a href="https://youtu.be/yCCxMfW0LTM">(watch on Youtube)</a>