diff --git a/snackmap.html b/snackmap.html
index da07105..c44d361 100644
--- a/snackmap.html
+++ b/snackmap.html
@@ -18,9 +18,9 @@
     </a>
     </div>
     <div id="image-modal" class="modal" style="display: none;">
-    <span class="close" onclick="closeModal()">&times;</span>
-    <img class="modal-content" id="modal-image" />
-    </div>
+  　<span class="close" onclick="closeModal()">&times;</span>
+  　<img class="modal-content" id="modal-image" alt="拡大画像" />
+　　</div>
   <div id="map"></div>
   <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
   <script src="map.js"></script>