diff --git a/src/Symfony/Component/Notifier/Bridge/Slack/Block/SlackSectionBlock.php b/src/Symfony/Component/Notifier/Bridge/Slack/Block/SlackSectionBlock.php
index 09b2ed46c8..14570f5100 100644
--- a/src/Symfony/Component/Notifier/Bridge/Slack/Block/SlackSectionBlock.php
+++ b/src/Symfony/Component/Notifier/Bridge/Slack/Block/SlackSectionBlock.php
@@ -44,6 +44,11 @@ final class SlackSectionBlock extends AbstractSlackBlock
             'text' => $text,
         ];
 
+        // Maximum number of items is 10
+        if (10 <= \count($this->options['fields'])) {
+            throw new \LogicException('Maximum number of fields should not exceed 10.');
+        }
+
         return $this;
     }