diff --git a/chai.md b/chai.md
index 41ff4114f..2d59d2bc9 100644
--- a/chai.md
+++ b/chai.md
@@ -3,6 +3,7 @@ title: Chai.js
 category: JavaScript libraries
 layout: 2017/sheet
 weight: -3
+updated: 2017-08-30
 version: chai v4.x
 ---