diff --git a/.github/workflows/python_actions.yml b/.github/workflows/python_actions.yml
index b43cb53..0199a0a 100644
--- a/.github/workflows/python_actions.yml
+++ b/.github/workflows/python_actions.yml
@@ -1,4 +1,4 @@
-# Copyright (c) 2021-2023 The University of Manchester
+# Copyright (c) 2021 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/.pylintrc b/.pylintrc
index a562ab0..93e548d 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2023 The University of Manchester
+# Copyright (c) 2019 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/requirements-test.txt b/requirements-test.txt
index d02f2b1..132179b 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/requirements.txt b/requirements.txt
index 89e70b6..e0cc11d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-# Copyright (c) 2021-2023 The University of Manchester
+# Copyright (c) 2021 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/setup.py b/setup.py
index fa272e5..320268c 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/__init__.py b/spinnaker_testbase/__init__.py
index fd20748..7dae25b 100644
--- a/spinnaker_testbase/__init__.py
+++ b/spinnaker_testbase/__init__.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021-2023 The University of Manchester
+# Copyright (c) 2021 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/_version.py b/spinnaker_testbase/_version.py
index 1edfa0d..db770c7 100644
--- a/spinnaker_testbase/_version.py
+++ b/spinnaker_testbase/_version.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021-2023 The University of Manchester
+# Copyright (c) 2021 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/base_test_case.py b/spinnaker_testbase/base_test_case.py
index 928caee..f22e805 100644
--- a/spinnaker_testbase/base_test_case.py
+++ b/spinnaker_testbase/base_test_case.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/root_script_builder.py b/spinnaker_testbase/root_script_builder.py
index 4e7913d..a9ee801 100644
--- a/spinnaker_testbase/root_script_builder.py
+++ b/spinnaker_testbase/root_script_builder.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/root_test_case.py b/spinnaker_testbase/root_test_case.py
index ae0de9e..26ac994 100644
--- a/spinnaker_testbase/root_test_case.py
+++ b/spinnaker_testbase/root_test_case.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/script_checker.py b/spinnaker_testbase/script_checker.py
index 6e83884..27c2c17 100644
--- a/spinnaker_testbase/script_checker.py
+++ b/spinnaker_testbase/script_checker.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/test_no_job_destroy.py b/spinnaker_testbase/test_no_job_destroy.py
index 5bb93e2..d82c7f5 100644
--- a/spinnaker_testbase/test_no_job_destroy.py
+++ b/spinnaker_testbase/test_no_job_destroy.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spinnaker_testbase/test_scripts_header b/spinnaker_testbase/test_scripts_header
index 55f5569..1c4b7c6 100644
--- a/spinnaker_testbase/test_scripts_header
+++ b/spinnaker_testbase/test_scripts_header
@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2023 The University of Manchester
+# Copyright (c) 2019 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/unittests/__init__.py b/unittests/__init__.py
index 6aba36f..064f111 100644
--- a/unittests/__init__.py
+++ b/unittests/__init__.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021-2023 The University of Manchester
+# Copyright (c) 2021 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/unittests/test_import_all_test.py b/unittests/test_import_all_test.py
index 1f064d9..7ed7431 100644
--- a/unittests/test_import_all_test.py
+++ b/unittests/test_import_all_test.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2017-2023 The University of Manchester
+# Copyright (c) 2017 The University of Manchester
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.