diff --git a/src/config/config.example.php b/src/config/config.example.php
index eb5e18d..3f86e98 100644
--- a/src/config/config.example.php
+++ b/src/config/config.example.php
@@ -37,10 +37,10 @@ define('DEBUG_ENABLED', false);
  * Set list of file extentions that should be disallowed in links
  * see https://github.com/piwik/github-issues-mirror/issues/5
  */
-define('FORBIDDEN_EXTENSIONS', ['swf', 'js', 'htm']);
+define('FORBIDDEN_EXTENSIONS', ['swf', 'js', 'htm', 'html']);
 
 /**
  * If you want to enable piwik tracking enter the URL to your piwik instance and the ID of the website here
  */
 define('PIWIK_URL', false);
-define('PIWIK_ID', false);
\ No newline at end of file
+define('PIWIK_ID', false);