diff --git a/docs/img/rank_algorithm.png b/docs/img/rank_algorithm.png
new file mode 100644
index 00000000..c8200f91
Binary files /dev/null and b/docs/img/rank_algorithm.png differ
diff --git a/docs/src/about_ranking.md b/docs/src/about_ranking.md
index d318ae82..36347932 100644
--- a/docs/src/about_ranking.md
+++ b/docs/src/about_ranking.md
@@ -26,4 +26,4 @@ Gravity = Decay gravity, 1.8 is default
 
 A plot of rank over 24 hours, of scores of 1, 5, 10, 100, 1000, with a scale factor of 10k.
 
-![](https://i.imgur.com/w8oBLlL.png)
+![](https://i.imgur.com/QukPR03.png)