diff --git a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst
index 4efb50398db..664107483dc 100644
--- a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst
+++ b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_31.rst
@@ -74,6 +74,7 @@ Changed APIs
 ^^^^^^^^^^^^
 
 - Clarify ``OCP\Files\Storage\IStorage::getOwner()`` returns ``string|false``.
+- The Nextcloud implementation of the ``log`` method of ``Psr\Log\LoggerInterface`` now supports ``Psr\Log\LogLevel`` as log level parameter.
 
 Deprecated APIs
 ^^^^^^^^^^^^^^^
@@ -84,3 +85,10 @@ Removed APIs
 ^^^^^^^^^^^^
 
 - Legacy, non functional, ``OC_App::getForms`` was removed.
+- All ``OCP\ILogger`` logging methods, deprecated since Nextcloud 20, are removed.
+    - The interface now only holds the Nextcloud internal logging level constants.
+      For all logging ``Psr\Log\LoggerInterface`` should be used.
+    - The ``OCP\ILogger`` interface can no longer be dependency injected as it now only holds constants.
+    - ``OCP\IServerContainer::getLogger`` was removed, use dependency injection with ``Psr\Log\LoggerInterface`` instead.
+- The internal class ``OC\AppFramework\Logger`` was removed, it should have been never used by apps.
+  All using apps should migrate to ``Psr\Log\LoggerInterface``.
\ No newline at end of file
diff --git a/developer_manual/basics/dependency_injection.rst b/developer_manual/basics/dependency_injection.rst
index 34f19b06f79..adb738ea701 100644
--- a/developer_manual/basics/dependency_injection.rst
+++ b/developer_manual/basics/dependency_injection.rst
@@ -381,7 +381,6 @@ Types:
 * ``\OCP\Files\IRootFolder``
 * ``\OCP\IGroupManager``
 * ``\OCP\IL10N``
-* ``\OCP\ILogger``
 * ``\OCP\BackgroundJob\IJobList``
 * ``\OCP\INavigationManager``
 * ``\OCP\IPreview``
diff --git a/developer_manual/digging_deeper/psr.rst b/developer_manual/digging_deeper/psr.rst
index 0ac945ebf49..99e6dedc6cc 100644
--- a/developer_manual/digging_deeper/psr.rst
+++ b/developer_manual/digging_deeper/psr.rst
@@ -22,7 +22,8 @@ PSR-3: Logger Interface
 
 .. versionadded:: 19
 
-The dependency injection container can inject an instance of a ``\Psr\Log\LoggerInterface``. This is merely a wrapper of the existing (and strongly typed) ``\OCP\ILogger``. Apps may still use the Nextcloud logger, but the `PSR-3`_ implementation shall easy the integration of 3rd party libraries that require the `PSR-3`_ logger.
+The dependency injection container can inject an instance of a ``\Psr\Log\LoggerInterface``.
+The `PSR-3`_ implementation shall easy the integration of 3rd party libraries that require the `PSR-3`_ logger.
 
 .. versionchanged:: 21
     Nextcloud ships version 1.1.3
@@ -30,6 +31,8 @@ The dependency injection container can inject an instance of a ``\Psr\Log\Logger
     Nextcloud ships version 1.1.4
 .. versionchanged:: 30
     Nextcloud ships version 2.0.0
+.. versionchanged:: 31
+    The ``\Psr\Log\LoggerInterface`` fully replaced the Nextcloud internal logging methods.
 
 .. _psr4: