diff --git a/themes/seven/style.css b/themes/seven/style.css
index 8bb8026..08ede6d 100644
--- a/themes/seven/style.css
+++ b/themes/seven/style.css
@@ -475,6 +475,9 @@ table th {
   border-color: #bebfb9;
   padding: 3px 10px;
 }
+table th.select-all {
+  width: 1px;
+}
 table th.active {
   background: #bdbeb9;
 }