diff --git a/assets/css/app.css b/assets/css/app.css
index 0fc37ae..97c3201 100644
--- a/assets/css/app.css
+++ b/assets/css/app.css
@@ -107,4 +107,11 @@ h2 {
 #rules-navbar.affix a {
     font-size: 14px;
     line-height: 14px;
-}
\ No newline at end of file
+}
+
+/* https://github.com/samber/awesome-prometheus-alerts/issues/356 */
+@media screen and (min-width: 64em) {
+    .main-content {
+        max-width: 80rem;
+    }
+}