diff --git a/IPython/frontend/html/notebook/static/less/notebook.less b/IPython/frontend/html/notebook/static/less/notebook.less
index 852e76297..0da6b5af3 100644
--- a/IPython/frontend/html/notebook/static/less/notebook.less
+++ b/IPython/frontend/html/notebook/static/less/notebook.less
@@ -113,6 +113,7 @@ span#notebook_name {
 #ipython-main-app {
     width: 100%;
     position: relative;
+    font-size: 110%;
 }
 
 span#quick_help_area {