diff --git a/CHANGES.md b/CHANGES.md
index 997a22b..a12d102 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,17 @@
+# v0.21.0
+
+- Disabled automatic switching to *.mtls.googleapis.com endpoints.
+
+- Various updates to autogenerated clients.
+
+_Please note:_ the release version is not indicative of an individual client's
+stability or version.
+
 # v0.20.0
 
-- WithGRPCConnectionPool is a no-op for some APIs
+- WithGRPCConnectionPool is a no-op for some APIs.
 
-- correctly report Go version of runtime
+- correctly report Go version of runtime.
 
 - Various updates to autogenerated clients.