diff --git a/static/css/header.css b/static/css/header.css
index f383c0c..d2eb132 100644
--- a/static/css/header.css
+++ b/static/css/header.css
@@ -31,6 +31,7 @@
 
 .wide_center_area {
   width: 45em;
+  max-width: 60%;
   height: 100%;
   margin: 0 auto;
 }
diff --git a/static/css/style.css b/static/css/style.css
index 39eb71b..3343869 100644
--- a/static/css/style.css
+++ b/static/css/style.css
@@ -280,6 +280,7 @@ img {
   padding: 0.2em;
   margin-top: 1.5em;
   width: 45em;
+  max-width: 60%;
 }
 
 #notebook_header_name:hover {