diff --git a/auto_examples/index.rst b/auto_examples/index.rst
index be13a054..24218aaf 100644
--- a/auto_examples/index.rst
+++ b/auto_examples/index.rst
@@ -22,6 +22,7 @@ of using the Flux Python API.
 
     <div class="sphx-glr-thumbnails">
 
+.. thumbnail-parent-div-open
 
 .. raw:: html
 
@@ -40,6 +41,8 @@ of using the Flux Python API.
     </div>
 
 
+.. thumbnail-parent-div-close
+
 .. raw:: html
 
     </div>