diff --git a/Text-Rendering-Overview.md b/Text-Rendering-Overview.md
index baf6569..4c1e7bb 100644
--- a/Text-Rendering-Overview.md
+++ b/Text-Rendering-Overview.md
@@ -7,7 +7,7 @@ Black: Class dependencies
 Dashed: Pointers
 Solid: Members
 Red: Rendering dependencies
-![Dependencies](https://github.com/herm/mapnik/raw/textplacement-merge/docs/textrendering.png)
+![Dependencies](https://github.com/herm/mapnik/raw/textplacement-merge/docs/textrendering.svg)