diff --git a/atlas/templates/atlas/collection_mark_question.html b/atlas/templates/atlas/collection_mark_question.html
index 3dcadf73..91bf08e1 100644
--- a/atlas/templates/atlas/collection_mark_question.html
+++ b/atlas/templates/atlas/collection_mark_question.html
@@ -33,7 +33,7 @@
     </form>
 
 
-    <div class="offcanvas offcanvas-right" data-bs-scroll="true" tabindex="-1" id="offcanvasTop" aria-labelledby="offcanvasTopLabel">
+    <div class="offcanvas offcanvas-end" data-bs-scroll="true" tabindex="-1" id="offcanvasTop" aria-labelledby="offcanvasTopLabel">
         <div class="offcanvas-header">
         {% for series in series_list %}
             <span class="series-block">