diff --git a/docs/notes/extensions.md b/docs/notes/extensions.md
index f8f53f3d564..af0534bb4c0 100644
--- a/docs/notes/extensions.md
+++ b/docs/notes/extensions.md
@@ -15,6 +15,7 @@ In addition, many charts can be found on the [npm registry](https://www.npmjs.co
- chartjs-plugin-annotation - Draws lines and boxes on chart area.
- chartjs-plugin-colorschemes - Enables automatic coloring using predefined color schemes.
+ - chartjs-plugin-crosshair - Adds a data crosshair to line and scatter charts
- chartjs-plugin-datalabels - Displays labels on data for any type of charts.
- chartjs-plugin-deferred - Defers initial chart update until chart scrolls into viewport.
- chartjs-plugin-draggable - Makes select chart elements draggable with the mouse.