diff --git a/lib/redmine_comments/application_helper_patch.rb b/lib/redmine_comments/application_helper_patch.rb
index ab1b280..d6f1832 100644
--- a/lib/redmine_comments/application_helper_patch.rb
+++ b/lib/redmine_comments/application_helper_patch.rb
@@ -14,16 +14,16 @@ def parse_inline_attachments(text, project, obj, attr, only_path, options)
     ## END PATCH
 
     if attachments.present?
-      text.gsub!(/src="([^\/"]+\.(bmp|gif|jpg|jpe|jpeg|png))"(\s+alt="([^"]*)")?/i) do |m|
+      text.gsub!(/src="([^\/"]+\.(bmp|gif|jpg|jpe|jpeg|png|webp))"(\s+alt="([^"]*)")?/i) do |m|
         filename, ext, alt, alttext = $1, $2, $3, $4
         # search for the picture in attachments
         if found = Attachment.latest_attach(attachments, CGI.unescape(filename))
           image_url = download_named_attachment_url(found, found.filename, :only_path => only_path)
-          desc = found.description.to_s.gsub('"', '')
+          desc = found.description.to_s.delete('"')
           if !desc.blank? && alttext.blank?
             alt = " title=\"#{desc}\" alt=\"#{desc}\""
           end
-          "src=\"#{image_url}\"#{alt}"
+          "src=\"#{image_url}\"#{alt} loading=\"lazy\""
         else
           m
         end