diff --git a/CHANGES.md b/CHANGES.md
index 1aef549aa8d..a43210b526a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,12 @@
 # Changes
 
+## [0.66.0](https://github.com/googleapis/google-api-go-client/compare/v0.65.0...v0.66.0) (2022-01-18)
+
+
+### Features
+
+* **all:** auto-regenerate discovery clients, refs [#1394](https://github.com/googleapis/google-api-go-client/issues/1394)
+
 ## [0.65.0](https://github.com/googleapis/google-api-go-client/compare/v0.64.0...v0.65.0) (2022-01-11)