core/lib/Drupal/Core/Cache/CacheableResponseTrait.php    | 7 ++++++-
 core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/core/lib/Drupal/Core/Cache/CacheableResponseTrait.php b/core/lib/Drupal/Core/Cache/CacheableResponseTrait.php
index 5b738c4..cda2f1d 100644
--- a/core/lib/Drupal/Core/Cache/CacheableResponseTrait.php
+++ b/core/lib/Drupal/Core/Cache/CacheableResponseTrait.php
@@ -22,7 +22,12 @@ public function addDependency($dependency) {
       $this->cacheabilityMetadata = new CacheableMetadata();
     }
 
-    $this->cacheabilityMetadata = $this->cacheabilityMetadata->merge(CacheableMetadata::createFromObject($dependency));
+    if (is_array($dependency)) {
+      $this->cacheabilityMetadata = $this->cacheabilityMetadata->merge(CacheableMetadata::createFromRenderArray($dependency));
+    }
+    else {
+      $this->cacheabilityMetadata = $this->cacheabilityMetadata->merge(CacheableMetadata::createFromObject($dependency));
+    }
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
index 3321ba0..45ce3d0 100644
--- a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
@@ -164,7 +164,7 @@ public function renderResponse(array $main_content, Request $request, RouteMatch
     // arrays to the response.
     foreach (['page_top', 'page', 'page_bottom'] as $region) {
       if (isset($html[$region])) {
-        $response->addDependency(CacheableMetadata::createFromRenderArray($html[$region]));
+        $response->addDependency($html[$region]);
       }
     }