diff --git a/libretube-theme/templates/base.html b/libretube-theme/templates/base.html
index 126017b..0186285 100644
--- a/libretube-theme/templates/base.html
+++ b/libretube-theme/templates/base.html
@@ -1,8 +1,7 @@
 <!DOCTYPE html>
 <html lang="{% block html_lang %}{{ DEFAULT_LANG }}{% endblock %}">
-    <head prefix="og: http://ogp.me/ns#{% if article %} article: http://ogp.me/ns/video#{% endif%}"{% if article %} itemscope itemtype="https://schema.org/VideoObject"{% endif %}>
+    <head prefix="og: https://ogp.me/ns/{% if article %}video{% endif %}#"{% if article %} itemscope itemtype="https://schema.org/VideoObject"{% endif %}>
         {% block head %}
-
             <!-- Meta Base -->
             <meta charset="UTF-8"/>
             <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
