diff --git a/phplib/Notification.php b/phplib/Notification.php
index f5cd9c1..38b6d09 100644
--- a/phplib/Notification.php
+++ b/phplib/Notification.php
@@ -345,8 +345,17 @@ public static function render($tpl, $vars, $debug_data=[]) {
 
         // Render the template. If there's an error, dump the output buffer.
         ob_start();
+        $template_file_list = [
+            sprintf('%s/exttemplates/%s.php', BASE_DIR, $tpl),
+            sprintf('%s/templates/%s.php', BASE_DIR, $tpl),
+        ];
         try {
-            require(sprintf('%s/templates/%s.php', BASE_DIR, $tpl));
+            foreach($template_file_list as $template_file) {
+                if(file_exists($template_file)) {
+                    require($template_file);
+                    break;
+                }
+            }
         } catch(\Exception $e) {
             ob_end_clean();
             throw $e;