diff --git a/cnames_active.js b/cnames_active.js
index a1f66a7b25e..b0b22f8775b 100644
--- a/cnames_active.js
+++ b/cnames_active.js
@@ -3176,6 +3176,7 @@ var cnames_active = {
   "techthinker": "tech-thinker.github.io",
   "techxuexi": "techxuexi.netlify.app",
   "techy": "hosting.gitbook.com",
+  "tectonics": "https://medeyros12.github.io/tectonics.js"
   "tejas": "harshsinghdev.github.io/tejas",
   "telaviv": "dustin-h.github.io/telaviv", // noCF? (don´t add this in a new PR)
   "telegraf": "telegraf.github.io/telegraf", // noCF? (don´t add this in a new PR)