diff --git a/pg_backup_api/news.md b/pg_backup_api/news.md
index b1be5e8..6cfec49 100644
--- a/pg_backup_api/news.md
+++ b/pg_backup_api/news.md
@@ -1,6 +1,12 @@
 # pg-backup-api release notes
 
-© Copyright EnterpriseDB UK Limited 2021-2023 - All rights reserved.
+© Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
+
+## 2.1.1 (2024-06-29)
+
+### Buxfixes
+
+- Functions/methods signatures updates to fix regression with Barman <= 3.9
 
 ## 2.1.0 (2024-01-25)
 
diff --git a/pg_backup_api/news.yml b/pg_backup_api/news.yml
index 277a4a1..b9c639c 100644
--- a/pg_backup_api/news.yml
+++ b/pg_backup_api/news.yml
@@ -1,8 +1,14 @@
-# © Copyright EnterpriseDB UK Limited 2021-2023 - All rights reserved.
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 
 # pg-backup-api News - History of user-visible changes
 
 pg-backup-api release notes:
+  - version: "2.1.1"
+    date: "20240629"
+    changes:
+      Buxfixes:
+        - Functions/methods signatures updates to fix regression with Barman <= 3.9
+
   - version: "2.1.0"
     date: "20240125"
     changes:
diff --git a/pg_backup_api/pg_backup_api/__init__.py b/pg_backup_api/pg_backup_api/__init__.py
index a0797cd..b8b94c8 100644
--- a/pg_backup_api/pg_backup_api/__init__.py
+++ b/pg_backup_api/pg_backup_api/__init__.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/__main__.py b/pg_backup_api/pg_backup_api/__main__.py
index f57ce50..ad576d2 100644
--- a/pg_backup_api/pg_backup_api/__main__.py
+++ b/pg_backup_api/pg_backup_api/__main__.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/app.py b/pg_backup_api/pg_backup_api/app.py
index 0ce4bde..31f90c6 100644
--- a/pg_backup_api/pg_backup_api/app.py
+++ b/pg_backup_api/pg_backup_api/app.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/logic/__init__.py b/pg_backup_api/pg_backup_api/logic/__init__.py
index bd439bb..e580e51 100644
--- a/pg_backup_api/pg_backup_api/logic/__init__.py
+++ b/pg_backup_api/pg_backup_api/logic/__init__.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/logic/utility_controller.py b/pg_backup_api/pg_backup_api/logic/utility_controller.py
index 5b9d97d..0c688e2 100644
--- a/pg_backup_api/pg_backup_api/logic/utility_controller.py
+++ b/pg_backup_api/pg_backup_api/logic/utility_controller.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
@@ -82,15 +82,20 @@ def diagnose() -> 'Response':
         for model in available_models:  # pyright: ignore
             model_dict[model] = barman.__config__.get_model(model)
 
-        barman_diagnose.exec_diagnose(server_dict,
-                                      model_dict,
-                                      errors_list,
-                                      show_config_source=False)
+        barman_diagnose.exec_diagnose(
+            server_dict,
+            model_dict,
+            errors_list,
+            show_config_source=False,
+        )  # pyright: ignore [reportCallIssue]
     # An attribute error is thown when calling `model_names()` if using Barman
     # older than 3.10, in which case models are not yet implemented, so we fall
     # back to the old signature of diagnose command.
     except AttributeError:
-        barman_diagnose.exec_diagnose(server_dict, errors_list)
+        barman_diagnose.exec_diagnose(
+            server_dict,
+            errors_list,
+        )  # pyright: ignore [reportCallIssue]
 
     # new outputs are appended, so grab the last one
     stored_output = json.loads(output._writer.json_output["_INFO"][-1])
diff --git a/pg_backup_api/pg_backup_api/run.py b/pg_backup_api/pg_backup_api/run.py
index 419fab2..c673a05 100644
--- a/pg_backup_api/pg_backup_api/run.py
+++ b/pg_backup_api/pg_backup_api/run.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/server_operation.py b/pg_backup_api/pg_backup_api/server_operation.py
index 154887a..545fd53 100644
--- a/pg_backup_api/pg_backup_api/server_operation.py
+++ b/pg_backup_api/pg_backup_api/server_operation.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/tests/test_main.py b/pg_backup_api/pg_backup_api/tests/test_main.py
index fc3d558..943a39b 100644
--- a/pg_backup_api/pg_backup_api/tests/test_main.py
+++ b/pg_backup_api/pg_backup_api/tests/test_main.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/tests/test_run.py b/pg_backup_api/pg_backup_api/tests/test_run.py
index f4d7d91..5aa7729 100644
--- a/pg_backup_api/pg_backup_api/tests/test_run.py
+++ b/pg_backup_api/pg_backup_api/tests/test_run.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/tests/test_server_operation.py b/pg_backup_api/pg_backup_api/tests/test_server_operation.py
index 38b403e..ae2d6bd 100644
--- a/pg_backup_api/pg_backup_api/tests/test_server_operation.py
+++ b/pg_backup_api/pg_backup_api/tests/test_server_operation.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/tests/test_utility_controller.py b/pg_backup_api/pg_backup_api/tests/test_utility_controller.py
index b8600c9..038e874 100644
--- a/pg_backup_api/pg_backup_api/tests/test_utility_controller.py
+++ b/pg_backup_api/pg_backup_api/tests/test_utility_controller.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/tests/test_utils.py b/pg_backup_api/pg_backup_api/tests/test_utils.py
index 9746edb..4f58827 100644
--- a/pg_backup_api/pg_backup_api/tests/test_utils.py
+++ b/pg_backup_api/pg_backup_api/tests/test_utils.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/pg_backup_api/utils.py b/pg_backup_api/pg_backup_api/utils.py
index 736c3e4..5bf679d 100644
--- a/pg_backup_api/pg_backup_api/utils.py
+++ b/pg_backup_api/pg_backup_api/utils.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2021-2023
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/scripts/changelogs.py b/pg_backup_api/scripts/changelogs.py
index d388e90..46d9e69 100755
--- a/pg_backup_api/scripts/changelogs.py
+++ b/pg_backup_api/scripts/changelogs.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-#  © Copyright EnterpriseDB UK Limited 2021-2023 - All rights reserved.
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 """
 Generate news.md from a source yaml file using Jinja templates.
diff --git a/pg_backup_api/scripts/templates/news.md.jinja2 b/pg_backup_api/scripts/templates/news.md.jinja2
index 01ab9fb..25a02dc 100644
--- a/pg_backup_api/scripts/templates/news.md.jinja2
+++ b/pg_backup_api/scripts/templates/news.md.jinja2
@@ -1,6 +1,6 @@
 # pg-backup-api release notes
 
-© Copyright EnterpriseDB UK Limited 2021-2023 - All rights reserved.
+© Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 
 {% for release in data["pg-backup-api release notes"] %}
     {# ## v22.9 (2022-02-24) #}
diff --git a/pg_backup_api/setup.py b/pg_backup_api/setup.py
index 74ed781..76241d7 100644
--- a/pg_backup_api/setup.py
+++ b/pg_backup_api/setup.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# © Copyright EnterpriseDB UK Limited 2013-2021
+# © Copyright EnterpriseDB UK Limited 2021-2024 - All rights reserved.
 #
 # This file is part of Postgres Backup API.
 #
diff --git a/pg_backup_api/version.txt b/pg_backup_api/version.txt
index 7ec1d6d..3e3c2f1 100644
--- a/pg_backup_api/version.txt
+++ b/pg_backup_api/version.txt
@@ -1 +1 @@
-2.1.0
+2.1.1