diff --git a/cnames_active.js b/cnames_active.js
index cdabb1fe..6e53fcdd 100644
--- a/cnames_active.js
+++ b/cnames_active.js
@@ -1615,6 +1615,7 @@ var cnames_active = {
   "splitting": "shshaw.github.io/Splitting",
   "spotix": "sawyerbx.github.io/spotix",
   "spreadsheet": "chiefofgxbxl.github.io/Spreadsheet.js",
+  "spring": "hosting.gitbook.com",
   "spritesheet": "arcadiogarcia.github.io/Spritesheet.js", // noCF? (don´t add this in a new PR)
   "spritewerk": "bildepunkt.github.io/spritewerk", // noCF? (don´t add this in a new PR)
   "squeak": "bertfreudenberg.github.io/SqueakJS",