diff --git a/src/Http/Router.php b/src/Http/Router.php
index 3b79c63..031683d 100644
--- a/src/Http/Router.php
+++ b/src/Http/Router.php
@@ -103,7 +103,8 @@ public function setBase(string $base) : void
      */
     public function addTypes(array $types) : void
     {
-        $this->types = Arrayify::merge($this->types, $types);
+        $this->types  = Arrayify::merge($this->types, $types);
+        $this->cache  = [];
     }
 
     /**