diff --git a/changelog.txt b/changelog.txt
index 170823a6..a7082d6f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -19,6 +19,7 @@ OPENSEADRAGON CHANGELOG
 * Tile cache keys are now generated by the tile source, so it's easier to override them as needed (#2138 @Aiosa)
 * Now if you pass an error handler into makeAjaxRequest, it doesn't report errors into the console (#2142 @Aiosa)
 * Fixed error caused by attaching MouseTracker to the page's document element (#2145 @tdiprima)
+* Added fallback and deprecation warning for Viewer.buttons (which got changed to buttonGroup in 3.0.0) (#2153 @devbyjonah)
 
 3.0.0: