diff --git a/public/style.css b/public/style.css
index 184429e..14b3b28 100644
--- a/public/style.css
+++ b/public/style.css
@@ -379,5 +379,5 @@ div.confirm_evaluation_button a:hover {
 div.confirm_evaluation_button a.disabled {
   text-decoration: none;
   color: gray;
-  display: hidden;
+  visibility: hidden;
 }
--
libgit2 0.21.2