diff --git a/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/lower_thirds.html b/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/lower_thirds.html
index a6d8d6e..458be8c 100644
--- a/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/lower_thirds.html
+++ b/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/lower_thirds.html
@@ -4,6 +4,7 @@
 <html>
     <head>
         <meta http-equiv="content-type" content="text/html" charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
         <title>{{ request.event.name }} lower thirds</title>
         {% compress js %}
             <script src="{% static "vendored/jquery-3.1.1.js" %}"></script>
diff --git a/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/room_info.html b/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/room_info.html
index 6154c99..66a52df 100644
--- a/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/room_info.html
+++ b/pretalx_broadcast_tools/templates/pretalx_broadcast_tools/room_info.html
@@ -4,6 +4,7 @@
 <html>
     <head>
         <meta http-equiv="content-type" content="text/html" charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
         <title>{{ request.event.name }} lower thirds</title>
         {% compress js %}
             <script src="{% static "vendored/jquery-3.1.1.js" %}"></script>
