diff --git a/src/Interfaces/Response/IContent.php b/src/Interfaces/Response/IContent.php
index 446a4ab..fef4842 100644
--- a/src/Interfaces/Response/IContent.php
+++ b/src/Interfaces/Response/IContent.php
@@ -4,7 +4,7 @@ interface IContent
 {
     public function &getData(): array;
 
-    public function &render(): string;
+    public function render(): void;
 
     public function getContentType(): string;
 }
diff --git a/src/Response/ContentBase.php b/src/Response/ContentBase.php
index 359cbdb..31d0053 100644
--- a/src/Response/ContentBase.php
+++ b/src/Response/ContentBase.php
@@ -11,7 +11,7 @@ abstract class ContentBase implements IContent
         return $this->data;
     }
 
-    abstract public function &render(): string;
+    abstract public function render(): void;
 
     abstract public function getContentType(): string;
 }
diff --git a/src/Response/HtmlContent.php b/src/Response/HtmlContent.php
index 2e1b13e..b5c9d6c 100644
--- a/src/Response/HtmlContent.php
+++ b/src/Response/HtmlContent.php
@@ -12,7 +12,7 @@ class HtmlContent extends ContentBase
         $this->data = &$data;
     }
 
-    public function &render(): string
+    public function render(): void
     {
         if (!empty($_ENV['DEV'])) {
             $generator = new Linker($this->view);
@@ -21,14 +21,9 @@ class HtmlContent extends ContentBase
 
         extract($this->data);
 
-        ob_start();
         require ROOT . '/cache/views/' . $this->view . '.php';
-        $content = ob_get_contents();
-        ob_end_clean();
 
-        $content .= '<!-- __debug__runtime: ' . round((hrtime(true) - SCRIPT_STARTED) / 1e+6, 1) . ' -->';
-
-        return $content;
+        echo '<!-- __debug__runtime: ' . round((hrtime(true) - SCRIPT_STARTED) / 1e+6, 1) . ' -->';
     }
 
     public function getContentType(): string
diff --git a/src/Response/JsonContent.php b/src/Response/JsonContent.php
index d71eab8..c2ecac0 100644
--- a/src/Response/JsonContent.php
+++ b/src/Response/JsonContent.php
@@ -7,13 +7,11 @@ class JsonContent extends ContentBase
         $this->data = &$data;
     }
 
-    public function &render(): string
+    public function render(): void
     {
         $this->data['__debug__runtime'] = round((hrtime(true) - SCRIPT_STARTED) / 1e+6, 1);
 
-        $content = json_encode($this->data);
-
-        return $content;
+        echo json_encode($this->data);
     }
 
     public function getContentType(): string