1 files changed, 1 insertions, 0 deletions
diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index e3572169d..a0a18e896 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -3541,6 +3541,7 @@ a.thumbnail:hover {
   font-weight: bold;
   line-height: 13px;
   color: #ffffff;
+  vertical-align: middle;
   white-space: nowrap;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
   background-color: #999999;