diff --git a/monstra/engine/shortcodes.php b/monstra/engine/shortcodes.php
index df0cddb..2454489 100644
--- a/monstra/engine/shortcodes.php
+++ b/monstra/engine/shortcodes.php
@@ -148,8 +148,8 @@
             if ( ! Shortcode::$shortcode_tags) return $content;
                  
             $shortcodes = implode('|', array_map('preg_quote', array_keys(Shortcode::$shortcode_tags)));
-            $pattern    = "/(.?)\{($shortcodes)(.*?)(\/)?\}(?(4)|(?:(.+?)\{\/\s*\\2\s*\}))?(.?)/s";
-                 
+            $pattern    = "/(.?)\{([$shortcodes]+)(.*?)(\/)?\}(?(4)|(?:(.+?)\{\/\s*\\2\s*\}))?(.?)/s";
+            
             return preg_replace_callback($pattern, 'Shortcode::_handle', $content);
         }