diff --git a/doc/source/changelog.rst b/doc/source/changelog.rst
index 10c81c6..9f11e9a 100644
--- a/doc/source/changelog.rst
+++ b/doc/source/changelog.rst
@@ -2,6 +2,11 @@
 Changelog
 #########
 
+Version 2.1 (2021-09-15)
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+- feat: add Pipeline.training attribute
+
 Version 2.0 (2020-11-25)
 ~~~~~~~~~~~~~~~~~~~~~~~~