diff --git a/shaargem.php b/shaargem.php
index ce8e825..1b0e382 100644
--- a/shaargem.php
+++ b/shaargem.php
@@ -60,7 +60,7 @@ function shaargem_plugin_init($conf)
  */
 function hook_shaargem_render_editlink($data)
 {
-	$ret=preg_match(",gemini://(.*)?/?(.*),", $data['link']['url'] ,$domain);
+	$ret=preg_match(",gemini://([\d\w\.\+\-@\:%._\~#=]+)/?,", $data['link']['url'] ,$domain);
 
 	error_log("ret:".$ret);
 	if ($ret)