diff --git a/admin/dashboard/templates/index.html b/admin/dashboard/templates/index.html
index 262869b..2e62f6a 100644
--- a/admin/dashboard/templates/index.html
+++ b/admin/dashboard/templates/index.html
@@ -160,7 +160,7 @@
                         </el-select>
                     </div>
                 </div>
-                <div class="chart-container" style="height: 300px;">
+                <div class="chart-container" style="height: 300px; width: 100%;">
                     <canvas id="hourlyMessageTrendChart"></canvas>
                 </div>
             </el-card>