diff --git a/IPython/html/static/notebook/less/menubar.less b/IPython/html/static/notebook/less/menubar.less
index e9827d0..7f776c0 100644
--- a/IPython/html/static/notebook/less/menubar.less
+++ b/IPython/html/static/notebook/less/menubar.less
@@ -5,7 +5,7 @@
   .navbar {
     border-top: 1px;
     border-radius: 0px 0px @border-radius-base @border-radius-base;
-    margin-bottom: -1px;
+    margin-bottom: 0px;
   }
   
   .navbar-toggle {
diff --git a/IPython/html/static/style/style.min.css b/IPython/html/static/style/style.min.css
index 4388dbd..f79f1fc 100644
--- a/IPython/html/static/style/style.min.css
+++ b/IPython/html/static/style/style.min.css
@@ -10320,7 +10320,7 @@ select[multiple].celltoolbar select {
 #menubar .navbar {
   border-top: 1px;
   border-radius: 0px 0px 2px 2px;
-  margin-bottom: -1px;
+  margin-bottom: 0px;
 }
 #menubar .navbar-toggle {
   float: left;