diff --git a/CSS/style-principal.css b/CSS/style-principal.css
index a55ca50..64efb92 100644
--- a/CSS/style-principal.css
+++ b/CSS/style-principal.css
@@ -940,7 +940,7 @@ footer h1 {
 
 .btn-topo:hover {
   background-color: #18ff03;
-  z-index: 77777;
+  z-index: 888888;
 }