diff --git a/.gitignore b/.gitignore
index 355a363b..12d7d356 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,4 @@ data/investigate/gravity.html
 data/investigate/gravity.html
 data/investigate/gravity.html
 data/investigate/gravity.html
+data/investigate/gravity.html