diff --git a/static/css/theme.css b/static/css/theme.css
index 8fef7bf2f6..43f41ec39e 100644
--- a/static/css/theme.css
+++ b/static/css/theme.css
@@ -378,6 +378,15 @@ textarea:focus, input[type="email"]:focus, input[type="number"]:focus, input[typ
     margin-right: 0px;
     right: 0;
 }
+
+/* we limit width if we have large screens */
+@media screen and ( min-width: 1300px ){ /* #sidebar/width + ./max-width */
+  #body #body-inner {
+      max-width: 1000px;
+      margin: auto;
+  }
+}
+
 #chapter {
     display: flex;
     align-items: center;