diff --git a/indico_themes_canonical/static/css/_default/participant-list.css b/indico_themes_canonical/static/css/_default/participant-list.css
index 97bd6f7..186acd8 100644
--- a/indico_themes_canonical/static/css/_default/participant-list.css
+++ b/indico_themes_canonical/static/css/_default/participant-list.css
@@ -21,4 +21,18 @@
   display: block;
   overflow-x: auto;
   white-space: nowrap;
+  height: 65vh;
+}
+
+table.i-table thead {
+  position: sticky;
+  top: 0;
+}
+
+table thead th:first-child,
+table tbody td:first-child {
+  position: sticky;
+  left: 0;
+  z-index: 2;
+  background: var(--brand-white);
 }
\ No newline at end of file