Release 2.9.4

core/Response/HttpResponse.php

@@ -51,7 +51,7 @@ class HttpResponse
         if (!$replace && isset($this->headers[$name])) {
             return false;
         } else {
-            $this->headers[$name] = $value;
+            $this->headers[$name] = str_replace(["\n", "\r"], ' ', $value);
         }
 
         return true;