diff --git a/source/_includes/talk/slides.html.twig b/source/_includes/talk/slides.html.twig
index db1f7c0de..f7161f31f 100644
--- a/source/_includes/talk/slides.html.twig
+++ b/source/_includes/talk/slides.html.twig
@@ -1,5 +1,5 @@
 {% if page.speakerdeck.id and page.speakerdeck.ratio %}
-    <div class="mt-4">
+    <div class="talk-slides mt-4">
         <h2>Slides</h2>
 
         <noscript>**Please enable JavaScript to view slides.**</noscript>