diff --git a/build/pkgs/mathjax/checksums.ini b/build/pkgs/mathjax/checksums.ini
index 6a6b233b2ae..76e362f6b28 100644
--- a/build/pkgs/mathjax/checksums.ini
+++ b/build/pkgs/mathjax/checksums.ini
@@ -2,3 +2,4 @@ tarball=mathjax-VERSION.tar.gz
 sha1=3f7abecf8cacd7f5d7f9ae6c3baca7739101c17d
 md5=ba1a65ab58aaad6c84f39735c619bc34
 cksum=1142131398
+upstream_url=https://trac.sagemath.org/raw-attachment/ticket/25833/mathjax-3.2.0.tar.gz