diff --git a/cnames_active.js b/cnames_active.js
index 18e62df8..af701487 100644
--- a/cnames_active.js
+++ b/cnames_active.js
@@ -1888,6 +1888,7 @@ var cnames_active = {
   "seesaw": "cajogos.github.io/seesaw",
   "segno": "keimeno.github.io/segno",
   "segoe-mdl2-css": "ckgrafico.github.io/Segoe-mdl2-assets-css", // noCF? (don´t add this in a new PR)
+  "sejong": "choijunseo.github.io/sejong",
   "select_io": "selaromi.github.io/select_io", // noCF? (don´t add this in a new PR)
   "selectors": "selectors.github.io/selectors.js",
   "selectric": "lcdsantos.github.io/jQuery-Selectric", // noCF? (don´t add this in a new PR)