diff --git a/content/ja/includes/task-tutorial-prereqs.md b/content/ja/includes/task-tutorial-prereqs.md
index a17936466c..c140d35ca7 100644
--- a/content/ja/includes/task-tutorial-prereqs.md
+++ b/content/ja/includes/task-tutorial-prereqs.md
@@ -4,4 +4,4 @@ Kubernetesクラスターが必要、かつそのクラスターと通信する
 以下のいずれかのKubernetesプレイグラウンドも使用できます:
 
 * [Killercoda](https://killercoda.com/playgrounds/scenario/kubernetes)
-* [Play with Kubernetes](http://labs.play-with-k8s.com/)
+* [Play with Kubernetes](https://labs.play-with-k8s.com/)