diff --git a/jupyter_notebook/static/tree/less/altuploadform.less b/jupyter_notebook/static/tree/less/altuploadform.less
index be608cf5b..c5798f0c8 100644
--- a/jupyter_notebook/static/tree/less/altuploadform.less
+++ b/jupyter_notebook/static/tree/less/altuploadform.less
@@ -13,6 +13,8 @@
 
     input.fileinput
     {
+        text-align: center;
+        vertical-align: middle;
         display: inline;
         opacity: 0;
         z-index: 2;