diff --git a/content/challenges/30.md b/content/challenges/30.md
index 7291bd0..fa26679 100644
--- a/content/challenges/30.md
+++ b/content/challenges/30.md
@@ -48,6 +48,6 @@ english:
 date: 2021-09-07
 ---
 
-This week's challenge is from [浴]{よく}[槽]{そう}とネオンテトラ's lyrics ([YouTube](https://www.youtube.com/watch?v=xlU8pUQ7mn8)):
+This week's challenge is from [浴]{よく}[槽]{そう}とネオンテトラ's lyrics ([YouTube](https://www.youtube.com/watch?v=NrfLlgv02hs)):
 
-{{< youtube xlU8pUQ7mn8 >}}
\ No newline at end of file
+{{< youtube NrfLlgv02hs >}}