1 files changed, 5 insertions, 3 deletions
diff --git a/matrix-specification/Responses/ClientRefreshPostResponse.php b/matrix-specification/Responses/ClientRefreshPostResponse.php
index b1e1154..38519a3 100644
--- a/matrix-specification/Responses/ClientRefreshPostResponse.php
+++ b/matrix-specification/Responses/ClientRefreshPostResponse.php
@@ -2,7 +2,9 @@
 
 namespace Matrix\Responses;
 
-class ClientRefreshPostResponse implements \JsonSerializable
+use Matrix\Response;
+
+class ClientRefreshPostResponse extends Response
 {
   public function __construct(
     private string $accessToken,
@@ -11,12 +13,12 @@ class ClientRefreshPostResponse implements \JsonSerializable
   )
   {}
 
-  public function jsonSerialize(): array
+  public function getBody(): array
   {
     return array_filter([
       "access_token" => $this->accessToken,
       "expires_in_ms" => $this->expiresInMilliseconds,
       "refresh_token" => $this->refreshToken,
-    ], "is_null");
+    ], fn ($value) => ! is_null($value));
   }
 }