diff --git a/first.html b/first.html
index 65e37e7..cfc7ce2 100644
--- a/first.html
+++ b/first.html
@@ -27,8 +27,8 @@
 <br>
 <div class="idou">
 <a href="location.href='https://www.yatex.org/gitbucket/j2223-sakura/concentration/pages/shinkei1.html'">神経衰弱ゲーム</a>
-<button onclick="location.href='https://www.yatex.org/gitbucket/j2223-sakura/JAXAtools/pages/GPS/index.html'">GPS宝探しゲーム</button>
-<button onclick="location.href='https://www.yatex.org/gitbucket/j2223-sakura/2024a/pages/map.html'">お店マップ</button>
+<a href="location.href='https://www.yatex.org/gitbucket/j2223-sakura/JAXAtools/pages/GPS/index.html'">GPS宝探しゲーム</a>
+<a href="location.href='https://www.yatex.org/gitbucket/j2223-sakura/2024a/pages/map.html'">お店マップ</a>
 </div>