diff --git a/templates/chart.html b/templates/chart.html
index 6d41db0..b8204f8 100644
--- a/templates/chart.html
+++ b/templates/chart.html
@@ -7,7 +7,7 @@
 {% block content %}
     <div class="pt-1 mb-3">
         <div class="row">
-            <div class="col-9">
+            <div class="col-8">
                 <select id="dateSelect" class="form-select" aria-label="日期选择">
                     {% for recent_result in recent_results %}
                         <option value="{{ recent_result.datestr }}" {{ 'selected' if date==recent_result.datestr else '' }}>
@@ -16,7 +16,7 @@
                     {% endfor %}
                 </select>
             </div>
-            <div class="col-2">
+            <div class="col-4">
                 <button type="button" class="btn btn-primary" onclick="back()">返回</button>
             </div>
         </div>