diff --git a/app/assets/stylesheets/base.css.erb b/app/assets/stylesheets/base.css.erb
index 09120edd..6c7364f4 100644
--- a/app/assets/stylesheets/base.css.erb
+++ b/app/assets/stylesheets/base.css.erb
@@ -958,6 +958,7 @@ font-family: 'din-regular', helvetica, sans-serif;
 
 .mapper {
     display: inline-block;
+    vertical-align: bottom;
     width:220px;
     height:340px;
     font-size: 12px;