diff --git a/system/src/Grav/Framework/Flex/FlexCollection.php b/system/src/Grav/Framework/Flex/FlexCollection.php
index 86671bdc2..beacea8d8 100644
--- a/system/src/Grav/Framework/Flex/FlexCollection.php
+++ b/system/src/Grav/Framework/Flex/FlexCollection.php
@@ -245,7 +245,7 @@ class FlexCollection extends ObjectCollection implements FlexCollectionInterface
      * {@inheritdoc}
      * @see FlexCollectionInterface::render()
      */
-    public function render($layout = null, array $context = [])
+    public function render(string $layout = null, array $context = [])
     {
         if (null === $layout) {
             $layout = 'default';
diff --git a/system/src/Grav/Framework/Flex/FlexIndex.php b/system/src/Grav/Framework/Flex/FlexIndex.php
index 9fa1a603c..b3b133edc 100644
--- a/system/src/Grav/Framework/Flex/FlexIndex.php
+++ b/system/src/Grav/Framework/Flex/FlexIndex.php
@@ -221,7 +221,7 @@ class FlexIndex extends ObjectIndex implements FlexCollectionInterface, FlexInde
      * {@inheritdoc}
      * @see FlexCollectionInterface::render()
      */
-    public function render($layout = null, array $context = [])
+    public function render(string $layout = null, array $context = [])
     {
         return $this->__call('render', [$layout, $context]);
     }
diff --git a/system/src/Grav/Framework/Flex/FlexObject.php b/system/src/Grav/Framework/Flex/FlexObject.php
index 78cbcfed5..8fe8602d6 100644
--- a/system/src/Grav/Framework/Flex/FlexObject.php
+++ b/system/src/Grav/Framework/Flex/FlexObject.php
@@ -357,7 +357,7 @@ class FlexObject implements FlexObjectInterface, FlexAuthorizeInterface
      * {@inheritdoc}
      * @see FlexObjectInterface::render()
      */
-    public function render($layout = null, array $context = [])
+    public function render(string $layout = null, array $context = [])
     {
         if (null === $layout) {
             $layout = 'default';
diff --git a/system/src/Grav/Framework/Flex/Interfaces/FlexCommonInterface.php b/system/src/Grav/Framework/Flex/Interfaces/FlexCommonInterface.php
index 89f12100f..482aef226 100644
--- a/system/src/Grav/Framework/Flex/Interfaces/FlexCommonInterface.php
+++ b/system/src/Grav/Framework/Flex/Interfaces/FlexCommonInterface.php
@@ -11,11 +11,8 @@ declare(strict_types=1);
 
 namespace Grav\Framework\Flex\Interfaces;
 
-use Grav\Framework\ContentBlock\ContentBlockInterface;
-use Grav\Framework\ContentBlock\HtmlBlock;
 use Grav\Framework\Flex\FlexDirectory;
-use Twig\Error\LoaderError;
-use Twig\Error\SyntaxError;
+use Grav\Framework\Interfaces\RenderInterface;
 
 /**
  * Defines common interface shared with both Flex Objects and Collections.
@@ -23,7 +20,7 @@ use Twig\Error\SyntaxError;
  * @used-by \Grav\Framework\Flex\FlexObject
  * @since 1.6
  */
-interface FlexCommonInterface
+interface FlexCommonInterface extends RenderInterface
 {
     /**
      * Get Flex Type of the object / collection.
@@ -64,22 +61,4 @@ interface FlexCommonInterface
      * @return string Returns cache checksum.
      */
     public function getCacheChecksum(): string;
-
-    /**
-     * Renders the object / collection.
-     *
-     * @example {% render object layout 'edit' with { limited: true } %}
-     * @example {% render collection layout 'list' %}
-     *
-     * @param string $layout Layout name.
-     * @param array $context Context given to the renderer.
-     *
-     * @return ContentBlockInterface|HtmlBlock Returns `HtmlBlock` containing the rendered output.
-     * @throws \Exception
-     * @throws \Throwable
-     * @throws LoaderError
-     * @throws SyntaxError
-     * @api
-     */
-    public function render($layout = null, array $context = []);
 }
diff --git a/system/src/Grav/Framework/Interfaces/RenderInterface.php b/system/src/Grav/Framework/Interfaces/RenderInterface.php
new file mode 100644
index 000000000..9185c1712
--- /dev/null
+++ b/system/src/Grav/Framework/Interfaces/RenderInterface.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @package    Grav\Framework\Interfaces
+ *
+ * @copyright  Copyright (C) 2015 - 2019 Trilby Media, LLC. All rights reserved.
+ * @license    MIT License; see LICENSE file for details.
+ */
+
+namespace Grav\Framework\Interfaces;
+
+use Grav\Framework\ContentBlock\ContentBlockInterface;
+use Grav\Framework\ContentBlock\HtmlBlock;
+
+/**
+ * Defines common interface to render any object.
+ *
+ * @used-by \Grav\Framework\Flex\FlexObject
+ * @since 1.6
+ */
+interface RenderInterface
+{
+    /**
+     * Renders the object.
+     *
+     * @example $block = $object->render('custom', ['variable' => 'value']);
+     * @example {% render object layout 'custom' with { variable: 'value' } %}
+     *
+     * @param string|null $layout  Layout to be used.
+     * @param array|null  $context Extra context given to the renderer.
+     *
+     * @return ContentBlockInterface|HtmlBlock Returns `HtmlBlock` containing the rendered output.
+     * @api
+     */
+    public function render(string $layout = null, array $context = []);
+}