diff --git a/src/BlockKit.php b/src/BlockKit.php
index fa1d182..622e1ee 100644
--- a/src/BlockKit.php
+++ b/src/BlockKit.php
@@ -12,7 +12,7 @@ use Slack\Exceptions\SlackSyntaxException;
  *
  * @package Slack
  */
-abstract class BlockKit implements \JsonSerializable
+abstract class BlockKit implements \JsonSerializable,\Countable
 {
 	protected Collection $_data;
 
diff --git a/src/Message.php b/src/Message.php
index cb9d763..3557cac 100644
--- a/src/Message.php
+++ b/src/Message.php
@@ -143,7 +143,7 @@ final class Message extends BlockKit
 	public function jsonSerialize()
 	{
 		// For interactive messages that generate a dialog, we need to return NULL
-		return $this->_data->count() ? parent::jsonSerialize() : NULL;
+		return count($this) ? parent::jsonSerialize() : NULL;
 	}
 
 	/**