diff --git a/cnames_active.js b/cnames_active.js
index b1820655..bbc7bc71 100644
--- a/cnames_active.js
+++ b/cnames_active.js
@@ -1374,6 +1374,7 @@ var cnames_active = {
   "mateocontenla": "taconeomental.github.io/mateocontenla",
   "materialish": "jamesplease.github.io/materialish",
   "materialize-bootbox": "iqbalfn.github.io/materialize-bootbox",
+  "math": "hegartycalculator.github.io/math.js",
   "matrix-rref-solver": "arisweedler.github.io/matrix-rref-solver",
   "matters2ipfs": "contributionls.github.io/matters2ipfs",
   "matthias-schuetz": "matthias-schuetz.github.io", // noCF? (don´t add this in a new PR)