diff --git a/app/models/metadata_template.rb b/app/models/metadata_template.rb
index 7149bcd..a85b84a 100644
--- a/app/models/metadata_template.rb
+++ b/app/models/metadata_template.rb
@@ -129,7 +129,7 @@ MetadataTemplate = Struct.new(:site, :document, :name, :label, :type,
   end
 
   def allowed_attributes
-    @allowed_attributes ||= %w[style src alt controls data-align].freeze
+    @allowed_attributes ||= %w[style href src alt controls data-align].freeze
   end
 
   def allowed_tags
diff --git a/app/views/posts/attributes/_content.haml b/app/views/posts/attributes/_content.haml
index db4210c..1e6fd41 100644
--- a/app/views/posts/attributes/_content.haml
+++ b/app/views/posts/attributes/_content.haml
@@ -70,4 +70,4 @@
           %input.form-control{ type: 'url', data: { prop: 'link-href' } }/
 
     .editor-content.form-control.h-auto{ contenteditable: 'true' }
-      = metadata.value
+      = metadata.value.html_safe