diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34cd9c9..0ccc1ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+### Removed
+- Compatibility with PHP < 8.1
+- Compatibility with JobRouter® < 2022.1
+
 ## [1.4.0] - 2022-08-21
 
 ### Added
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 25128ba..5c17b65 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -11,6 +11,13 @@ to `Semantic Versioning <https://semver.org/spec/v2.0.0.html>`_.
 `Unreleased <https://github.com/brotkrueml/jobrouter-client/compare/v1.4.0...HEAD>`_
 ----------------------------------------------------------------------------------------
 
+Removed
+^^^^^^^
+
+
+* Compatibility with PHP < 8.1
+* Compatibility with JobRouter® < 2022.1
+
 `1.4.0 <https://github.com/brotkrueml/jobrouter-client/compare/v1.3.0...v1.4.0>`_ - 2022-08-21
 --------------------------------------------------------------------------------------------------
 
diff --git a/src/Mapper/RouteContentTypeMapper.php b/src/Mapper/RouteContentTypeMapper.php
index 0d7e899..9e48a77 100644
--- a/src/Mapper/RouteContentTypeMapper.php
+++ b/src/Mapper/RouteContentTypeMapper.php
@@ -32,10 +32,7 @@ final class RouteContentTypeMapper
             'application/fileuploads/.+?' => '',
             'application/jobarchive/archives/.+?/documents/.+?' => '',
             'application/sessions' => '',
-            'application/sessions/.+?' => '',
             'application/steps/.+?/lock' => '',
-            // @deprecated, only available in JobRouter 4.2
-            'configuration/sessions/.+?' => '',
             'designer/process/.+?/.+?/data/.+?' => '',
             'designer/process/.+?/.+?/dialogscripts/:dialog/:id' => '',
             'designer/process/.+?/.+?/functions/.+?' => '',
@@ -45,8 +42,6 @@ final class RouteContentTypeMapper
         ],
         'PATCH' => [
             'application/sessions' => '',
-            // @deprecated, only available in JobRouter 4.2
-            'application/sessions/.+?' => '',
         ],
         'POST' => [
             'application/documenthub' => self::CONTENT_TYPE_MULTIPART_FORMDATA,
@@ -69,8 +64,6 @@ final class RouteContentTypeMapper
         'PUT' => [
             'application/dashboards/.+?' => '',
             'application/incidents/.+?' => self::CONTENT_TYPE_MULTIPART_FORMDATA,
-            // @deprecated, only available in JobRouter 4.2
-            'application/sessions/.+?' => '',
         ],
     ];
 
diff --git a/tests/Unit/Mapper/routes.txt b/tests/Unit/Mapper/routes.txt
index 709a077..fedcb07 100644
--- a/tests/Unit/Mapper/routes.txt
+++ b/tests/Unit/Mapper/routes.txt
@@ -1,4 +1,4 @@
-# Routes available in JobRouter 4.2-5.2 / 2022.1-2022.4
+# Routes available in JobRouter 2022.1-2022.4
 # Format: <route> <method> <expected content type>
 /application/attachments/:workflowId/:dialogField GET -
 /application/attachments/:workflowId/:id GET -
@@ -54,10 +54,6 @@
 /application/sessions PATCH -
 /application/sessions POST application/json
 /application/sessions PUT application/json
-/application/sessions/:resourceId DELETE -
-/application/sessions/:sessionId GET -
-/application/sessions/:sessionId PATCH -
-/application/sessions/:sessionId PUT -
 /application/steps POST application/json
 /application/steps/:workflowId GET -
 /application/steps/:workflowId PUT application/json
@@ -88,9 +84,6 @@
 /configuration/languages GET -
 /configuration/languages/:language/:title GET -
 /configuration/sessions GET -
-/configuration/sessions/:sessionId DELETE -
-/configuration/sessions/:sessionId GET -
-/configuration/sessions/:sessionId PUT application/json
 /configuration/settings GET -
 /configuration/settings/:settingName GET -
 /configuration/settings/:settingName PUT application/json