diff --git a/data/codex.json b/data/codex.json
index 6d7d08bf..106349da 100644
--- a/data/codex.json
+++ b/data/codex.json
@@ -27,6 +27,11 @@
           , "description": ""
           , "render-file": false }
 
+        , { "name": "plugins"
+          , "title": "utility : assert"
+          , "file": "../chai/lib/chai/assertion.js"
+          , "description": ""
+          , "render-file": false }
         , { "name": "plugins"
           , "title": "utility : addMethod"
           , "file": "../chai/lib/chai/utils/addMethod.js"