diff --git a/docs/_static/css/ribbon.css b/docs/_static/css/ribbon.css
index 6008cb1..afb9480 100644
--- a/docs/_static/css/ribbon.css
+++ b/docs/_static/css/ribbon.css
@@ -59,5 +59,5 @@
 /* fix width of the screen */
 
 .wy-nav-content {
-    max-width: none;
+    max-width: 800px;
 }