diff --git a/static/css/cours.css b/static/css/cours.css
index b3f2e3f..a27f0fb 100644
--- a/static/css/cours.css
+++ b/static/css/cours.css
@@ -85,7 +85,7 @@ input[type="text"] {
 }
 
 /* breakpoint */
-@media only screen and (max-width: 640px) {
+@media only screen and (max-width: 740px) {
   aside {
     display: none;
     width: unset;