diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 530215ce..d096d27c 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -5,6 +5,19 @@ Ansible Changelog Tool Release Notes
 .. contents:: Topics
 
 
+v0.21.0
+=======
+
+Release Summary
+---------------
+
+Maintenance release with a deprecation.
+
+Deprecated Features
+-------------------
+
+- Support for ``classic`` changelogs is deprecated and will be removed soon. If you need to build changelogs for Ansible 2.9 or before, please use an older version (https://github.com/ansible-community/antsibull-changelog/pull/123).
+
 v0.20.0
 =======
 
diff --git a/changelogs/changelog.yaml b/changelogs/changelog.yaml
index 31dfb6fd..3fc69ba0 100644
--- a/changelogs/changelog.yaml
+++ b/changelogs/changelog.yaml
@@ -181,6 +181,17 @@ releases:
     - 105-version-codename.yml
     - 109-build-system.yml
     release_date: '2023-03-29'
+  0.21.0:
+    changes:
+      deprecated_features:
+      - Support for ``classic`` changelogs is deprecated and will be removed soon.
+        If you need to build changelogs for Ansible 2.9 or before, please use an older
+        version (https://github.com/ansible-community/antsibull-changelog/pull/123).
+      release_summary: Maintenance release with a deprecation.
+    fragments:
+    - 0.21.0.yml
+    - 123-deprecate-classic.yml
+    release_date: '2023-06-27'
   0.3.0:
     changes:
       minor_changes:
diff --git a/changelogs/fragments/0.21.0.yml b/changelogs/fragments/0.21.0.yml
deleted file mode 100644
index 32bafcb1..00000000
--- a/changelogs/fragments/0.21.0.yml
+++ /dev/null
@@ -1,3 +0,0 @@
-release_summary: Maintenance release with a deprecation.
-
-
diff --git a/changelogs/fragments/123-deprecate-classic.yml b/changelogs/fragments/123-deprecate-classic.yml
deleted file mode 100644
index 729c81a9..00000000
--- a/changelogs/fragments/123-deprecate-classic.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-deprecated_features:
-  - "Support for ``classic`` changelogs is deprecated and will be removed soon. If you need to build changelogs for Ansible 2.9 or before, please use an older version (https://github.com/ansible-community/antsibull-changelog/pull/123)."