diff --git a/doc/Makefile b/doc/Makefile
index 16dea3fed..91e497cbb 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -1,2 +1,2 @@
 apple-by-example.html: apple-by-example.md
-	pandoc -s $^ -o $@ --toc
+	pandoc --mathjax -s $^ -o $@ --toc