diff --git a/inc/Service/Embed/OembedExtractor.php b/inc/Service/Embed/OembedExtractor.php
index 759e9c60..f86b2013 100644
--- a/inc/Service/Embed/OembedExtractor.php
+++ b/inc/Service/Embed/OembedExtractor.php
@@ -40,7 +40,7 @@ class OembedExtractor {
 				],
 				$this->provider_timeout
 			);
-			$json = \json_decode($body, null, 512, \JSON_THROW_ON_ERROR);
+			$json = \json_decode($body, true, 512, \JSON_THROW_ON_ERROR);
 
 			$ret = [
 				'title' => $json['title'] ?? null,
@@ -55,12 +55,12 @@ class OembedExtractor {
 				}
 			}
 
-			$this->cache->set("oembed_embedder_$url$provider_url", $ret, $cache_timeout);
+			$this->cache->set("oembed_embedder_$provider_url$url", $ret, $cache_timeout);
 		}
 
 		$resp = new OembedResponse();
 		$resp->title = $ret['title'];
 		$resp->thumbnail_url = $ret['thumbnail_url'];
-		return $ret;
+		return $resp;
 	}
 }