diff --git a/views/admin/index/login.html b/views/admin/index/login.html
index 3d19939..117439e 100644
--- a/views/admin/index/login.html
+++ b/views/admin/index/login.html
@@ -29,7 +29,7 @@
             <div class="form-group">
                 <input type="text" name="captcha" class="form-control" placeholder="验证码" required style="width: 65%;display: inline-block;float: left;">
                 <div style="display: inline-block;float: left;height: 41px;">
-                    <img src="{:captcha_src()}" alt="captcha" style="height: 80%;" onclick="this.src=this.src + Math.random()"/>
+                    <img src="{:captcha_src()}" alt="captcha" style="height: 80%;" onclick="this.src=this.src + '?' + Math.random()"/>
                 </div>
             </div>
             <button type="submit" class="btn btn-primary block full-width m-b">登 录</button>