diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 1f5b1627..1e65c905 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -4,6 +4,40 @@ Community PostgreSQL Collection Release Notes
 
 .. contents:: Topics
 
+v4.0.0
+======
+
+Release Summary
+---------------
+
+This is a major release of the ``community.postgresql`` collection.
+This changelog contains all changes to the modules and plugins in this collection
+that have been made after the previous release.
+
+Major Changes
+-------------
+
+- the collection does not test against Python 2 and starts accepting content written in Python 3 since collection version 4.0.0 (https://github.com/ansible-collections/community.postgresql/issues/829).
+
+Minor Changes
+-------------
+
+- postgresql_user - return a PostgreSQL error message when a user cannot be removed.
+
+Deprecated Features
+-------------------
+
+- postgresql modules = the ``login``, ``unix_socket`` and ``host`` aliases are deprecated and will be removed in ``community.postgresql 5.0.0``, use the ``login_user``, ``login_unix_socket`` and ``login_host`` arguments instead.
+- postgresql_set - the module has been deprecated and will be removed in ``community.postgresql 5.0.0``. Please use the ``community.postgresql.postgresql_alter_system`` module instead (https://github.com/ansible-collections/community.postgresql/issues/823).
+
+Removed Features (previously deprecated)
+----------------------------------------
+
+- postgresql_info - the db alias has been removed in ``community.postgresql 4.0.0``. Please use the ``login_db`` option instead (https://github.com/ansible-collections/community.postgresql/issues/801).
+- postgresql_lang - the module has been removed in ``community.postgresql 4.0.0``. Please use the ``community.postgresql.postgresql_ext`` module instead (https://github.com/ansible-collections/community.postgresql/issues/561).
+- postgresql_privs - the ``password`` argument has been removed in ``community.postgresql 4.0.0``. Use the ``login_password`` argument instead (https://github.com/ansible-collections/community.postgresql/issues/408).
+- postgresql_user - the ``priv`` argument has been removed in ``community.postgresql 4.0.0``. Please use the ``community.postgresql.postgresql_privs`` module to grant/revoke privileges instead (https://github.com/ansible-collections/community.postgresql/issues/493).
+
 v3.14.0
 =======
 
diff --git a/changelogs/changelog.yaml b/changelogs/changelog.yaml
index f5c029dc..a078b1e9 100644
--- a/changelogs/changelog.yaml
+++ b/changelogs/changelog.yaml
@@ -1023,3 +1023,42 @@ releases:
     - 3.9.1.yml
     - 779-fix-address.yaml
     release_date: '2024-12-05'
+  4.0.0:
+    changes:
+      deprecated_features:
+      - postgresql modules = the ``login``, ``unix_socket`` and ``host`` aliases are
+        deprecated and will be removed in ``community.postgresql 5.0.0``, use the
+        ``login_user``, ``login_unix_socket`` and ``login_host`` arguments instead.
+      - postgresql_set - the module has been deprecated and will be removed in ``community.postgresql
+        5.0.0``. Please use the ``community.postgresql.postgresql_alter_system`` module
+        instead (https://github.com/ansible-collections/community.postgresql/issues/823).
+      major_changes:
+      - the collection does not test against Python 2 and starts accepting content
+        written in Python 3 since collection version 4.0.0 (https://github.com/ansible-collections/community.postgresql/issues/829).
+      minor_changes:
+      - postgresql_user - return a PostgreSQL error message when a user cannot be
+        removed.
+      release_summary: 'This is a major release of the ``community.postgresql`` collection.
+
+        This changelog contains all changes to the modules and plugins in this collection
+
+        that have been made after the previous release.'
+      removed_features:
+      - postgresql_info - the db alias has been removed in ``community.postgresql
+        4.0.0``. Please use the ``login_db`` option instead (https://github.com/ansible-collections/community.postgresql/issues/801).
+      - postgresql_lang - the module has been removed in ``community.postgresql 4.0.0``.
+        Please use the ``community.postgresql.postgresql_ext`` module instead (https://github.com/ansible-collections/community.postgresql/issues/561).
+      - postgresql_privs - the ``password`` argument has been removed in ``community.postgresql
+        4.0.0``. Use the ``login_password`` argument instead (https://github.com/ansible-collections/community.postgresql/issues/408).
+      - postgresql_user - the ``priv`` argument has been removed in ``community.postgresql
+        4.0.0``. Please use the ``community.postgresql.postgresql_privs`` module to
+        grant/revoke privileges instead (https://github.com/ansible-collections/community.postgresql/issues/493).
+    fragments:
+    - 0-remove_lang.yml
+    - 1-remove_privs.yml
+    - 2-privs.yml
+    - 4-aliases.yml
+    - 4.0.0.yml
+    - 5-python2.yml
+    - 6-set_deprecate.yml
+    release_date: '2025-05-06'
diff --git a/changelogs/fragments/0-remove_lang.yml b/changelogs/fragments/0-remove_lang.yml
deleted file mode 100644
index e25c6f59..00000000
--- a/changelogs/fragments/0-remove_lang.yml
+++ /dev/null
@@ -1,3 +0,0 @@
-removed_features:
-- "postgresql_lang - the module has been removed in ``community.postgresql 4.0.0``. Please use the ``community.postgresql.postgresql_ext`` module instead (https://github.com/ansible-collections/community.postgresql/issues/561)."
-- "postgresql_info - the db alias has been removed in ``community.postgresql 4.0.0``. Please use the ``login_db`` option instead (https://github.com/ansible-collections/community.postgresql/issues/801)."
diff --git a/changelogs/fragments/1-remove_privs.yml b/changelogs/fragments/1-remove_privs.yml
deleted file mode 100644
index 3b1b6126..00000000
--- a/changelogs/fragments/1-remove_privs.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-removed_features:
-- postgresql_user - the ``priv`` argument has been removed in ``community.postgresql 4.0.0``. Please use the ``community.postgresql.postgresql_privs`` module to grant/revoke privileges instead (https://github.com/ansible-collections/community.postgresql/issues/493).
-
-minor_changes:
-- postgresql_user - return a PostgreSQL error message when a user cannot be removed.
diff --git a/changelogs/fragments/2-privs.yml b/changelogs/fragments/2-privs.yml
deleted file mode 100644
index 73b6d349..00000000
--- a/changelogs/fragments/2-privs.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-removed_features:
-- postgresql_privs - the ``password`` argument has been removed in ``community.postgresql 4.0.0``. Use the ``login_password`` argument instead (https://github.com/ansible-collections/community.postgresql/issues/408).
diff --git a/changelogs/fragments/4-aliases.yml b/changelogs/fragments/4-aliases.yml
deleted file mode 100644
index a6fb6b5f..00000000
--- a/changelogs/fragments/4-aliases.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-deprecated_features:
-- postgresql modules = the ``login``, ``unix_socket`` and ``host`` aliases are deprecated and will be removed in ``community.postgresql 5.0.0``, use the ``login_user``, ``login_unix_socket`` and ``login_host`` arguments instead.
diff --git a/changelogs/fragments/5-python2.yml b/changelogs/fragments/5-python2.yml
deleted file mode 100644
index ff40c99d..00000000
--- a/changelogs/fragments/5-python2.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-major_changes:
-- the collection does not test against Python 2 and starts accepting content written in Python 3 since collection version 4.0.0 (https://github.com/ansible-collections/community.postgresql/issues/829).
diff --git a/changelogs/fragments/6-set_deprecate.yml b/changelogs/fragments/6-set_deprecate.yml
deleted file mode 100644
index 92fae91b..00000000
--- a/changelogs/fragments/6-set_deprecate.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-deprecated_features:
-- "postgresql_set - the module has been deprecated and will be removed in ``community.postgresql 5.0.0``. Please use the ``community.postgresql.postgresql_alter_system`` module instead (https://github.com/ansible-collections/community.postgresql/issues/823)."