diff --git a/default_environment/templates/html/main.dust b/default_environment/templates/html/main.dust
index 4c3a4f2..62e6748 100644
--- a/default_environment/templates/html/main.dust
+++ b/default_environment/templates/html/main.dust
@@ -1,7 +1,8 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
     {#global_settings.css_files}<link rel="stylesheet" href="{.}">{/global_settings.css_files}
     {#global_settings.js_files}<script type="text/javascript" src="{.}"></script>{/global_settings.js_files}
     {?global_settings.page_title}<title>{global_settings.page_title}</title>{/global_settings.page_title}
