diff --git a/slow/slow.py b/slow/slow.py
index 0d50ffa..b71856c 100644
--- a/slow/slow.py
+++ b/slow/slow.py
@@ -79,6 +79,7 @@ class App:
             404: _default_404_route,
             405: _default_405_route,
         }
+        self.CORS = CORS()
 
     def _pattern_to_regex(self, temp) -> re.Pattern[str]:
         re_temp = temp