diff --git a/static/roannais-icitoyen/_custom.scss b/static/roannais-icitoyen/_custom.scss
index a970a032..b22e0477 100644
--- a/static/roannais-icitoyen/_custom.scss
+++ b/static/roannais-icitoyen/_custom.scss
@@ -701,7 +701,8 @@ body:not(.page-template-homepage) #sidebar {
 				border: none;
 				background-color: transparent;
 				margin: 0;
-				flex-grow: 1;
+				flex: 1 1 auto;
+				width: 50%;
 			}
 			button {
 				border-radius: $custom-border-radius;