release version 2.1.1
diff --git a/CHANGES.rst b/CHANGES.rst
index 8214900cc5..9e740614d0 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,7 +3,7 @@
 Version 2.1.1
 -------------
 
-Unreleased
+Released on 2022-03-30
 
 -   Set the minimum required version of importlib_metadata to 3.6.0,
     which is required on Python < 3.10. :issue:`4502`
