diff --git a/static/lille/_custom.scss b/static/lille/_custom.scss
index 02baf6c6..64a74a18 100644
--- a/static/lille/_custom.scss
+++ b/static/lille/_custom.scss
@@ -125,6 +125,7 @@ div.gru-nav .gru-nav-button {
 		position: absolute;
 		width: $width;
 		border-top: 0;
+		z-index: 1000;
 	}
 }