diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index 732724f137..c0f3d041e6 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -5132,6 +5132,7 @@ input[type="submit"].btn.btn-mini {
 }
 
 .modal-body {
+  position: relative;
   max-height: 400px;
   padding: 15px;
   overflow-y: auto;