diff --git a/sphinx_audeering_theme/static/css/audeering.css b/sphinx_audeering_theme/static/css/audeering.css
index ce7dad7..77bba14 100644
--- a/sphinx_audeering_theme/static/css/audeering.css
+++ b/sphinx_audeering_theme/static/css/audeering.css
@@ -306,7 +306,6 @@ dl.property dt em {
 }
 .wy-table-responsive thead th {
     /* Fix border lines in table headers */
-    border: solid 1px var(--grey);
     border-bottom: solid 2px var(--grey);
 }
 .wy-table-responsive tbody tr th.stub {