diff --git a/docs-2.0/stylesheets/extra.css b/docs-2.0/stylesheets/extra.css
index f68457803fd..1e397dffea2 100644
--- a/docs-2.0/stylesheets/extra.css
+++ b/docs-2.0/stylesheets/extra.css
@@ -17,3 +17,9 @@
   --md-code-bg-color:  #eaebec;
   --md-typeset-color:   #000000;
 }
+
+
+/* uncover the upper edge of the version selection box by box-shadow */
+div>nav>label.md-nav__title {
+  box-shadow: none!important;
+}
\ No newline at end of file