diff --git a/Bootstrap.Admin/Views/Shared/Footer.cshtml b/Bootstrap.Admin/Views/Shared/Footer.cshtml
index 82c19d88..3862115e 100644
--- a/Bootstrap.Admin/Views/Shared/Footer.cshtml
+++ b/Bootstrap.Admin/Views/Shared/Footer.cshtml
@@ -1,5 +1,5 @@
 @model ModelBase
-<footer class="site-footer fixed">
+<footer class="site-footer position-fixed">
     <span id="websiteFooter">@Model.Footer</span>
     <a id="gotoTop" href="#" class="go-top" title="返回顶部" data-toggle="tooltip" data-placement="left">
         <i class="fa fa-angle-up"></i>
diff --git a/Bootstrap.Admin/wwwroot/css/site.css b/Bootstrap.Admin/wwwroot/css/site.css
index 67d6527d..7b5b3e17 100644
--- a/Bootstrap.Admin/wwwroot/css/site.css
+++ b/Bootstrap.Admin/wwwroot/css/site.css
@@ -226,11 +226,6 @@ a, a:hover, a:focus {
         margin-left: 4px;
     }
 
-.fixed {
-    position: fixed;
-    z-index: 100;
-}
-
 .go-top {
     background: rgba(255,255,255,.5);
     width: 20px;
diff --git a/Bootstrap.Admin/wwwroot/js/longbow.common.js b/Bootstrap.Admin/wwwroot/js/longbow.common.js
index 87a945b3..54ea7cbf 100644
--- a/Bootstrap.Admin/wwwroot/js/longbow.common.js
+++ b/Bootstrap.Admin/wwwroot/js/longbow.common.js
@@ -253,9 +253,9 @@
             return this;
         },
         footer: function (options) {
-            if ($(window).width() >= 768) { return this.addClass('fixed'); }
+            if ($(window).width() >= 768) { return this.addClass('position-fixed'); }
             var op = $.extend({ header: "header", content: ".main-content" }, options);
-            return $(op.header).outerHeight() + $(op.content).outerHeight() + this.outerHeight() > $(window).height() ? this.removeClass('fixed') : this.addClass('fixed');
+            return $(op.header).outerHeight() + $(op.content).outerHeight() + this.outerHeight() > $(window).height() ? this.removeClass('position-fixed') : this.addClass('position-fixed');
         },
         lgbTable: function (options) {
             var bsa = new DataTable($.extend(options.dataBinder, { url: options.url }));