diff --git a/.gitignore b/.gitignore
index 775f2d24b64ecda6a036b0d7b4b2ea62a1a24210..c29fa3e3a48e9846b5c7c422b746589cb740802d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,7 @@ examples/*/*/*.rst
 examples/*/*/*.hdf5
 examples/*/*/*.csv
 examples/*/*/*.dot
+examples/*/*/cell_hierarchy.html
 examples/*/*/energy.txt
 examples/*/*/task_level.txt
 examples/*/*/timesteps_*.txt