diff --git a/pytket/extensions/pyquil/__init__.py b/pytket/extensions/pyquil/__init__.py
index 9dad67f..2013e32 100644
--- a/pytket/extensions/pyquil/__init__.py
+++ b/pytket/extensions/pyquil/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Cambridge Quantum Computing
+# Copyright 2019-2024 Cambridge Quantum Computing
 #
 # 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/pytket/extensions/pyquil/backends/__init__.py b/pytket/extensions/pyquil/backends/__init__.py
index f1fa49e..75e1c79 100644
--- a/pytket/extensions/pyquil/backends/__init__.py
+++ b/pytket/extensions/pyquil/backends/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Cambridge Quantum Computing
+# Copyright 2019-2024 Cambridge Quantum Computing
 #
 # 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/pytket/extensions/pyquil/backends/forest.py b/pytket/extensions/pyquil/backends/forest.py
index 4444cb0..3fc2c8b 100644
--- a/pytket/extensions/pyquil/backends/forest.py
+++ b/pytket/extensions/pyquil/backends/forest.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Cambridge Quantum Computing
+# Copyright 2019-2024 Cambridge Quantum Computing
 #
 # 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/pytket/extensions/pyquil/pyquil_convert.py b/pytket/extensions/pyquil/pyquil_convert.py
index f1b8ecc..81bdd14 100644
--- a/pytket/extensions/pyquil/pyquil_convert.py
+++ b/pytket/extensions/pyquil/pyquil_convert.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Cambridge Quantum Computing
+# Copyright 2019-2024 Cambridge Quantum Computing
 #
 # 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 0ecede0..2888608 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# Copyright 2020-2023 Cambridge Quantum Computing
+# Copyright 2020-2024 Cambridge Quantum Computing
 #
 # 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/tests/pyquil_convert_test.py b/tests/pyquil_convert_test.py
index 1870b6e..3066416 100644
--- a/tests/pyquil_convert_test.py
+++ b/tests/pyquil_convert_test.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Cambridge Quantum Computing
+# Copyright 2019-2024 Cambridge Quantum Computing
 #
 # 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/tests/qvm_backend_test.py b/tests/qvm_backend_test.py
index f487b4c..a5862c5 100644
--- a/tests/qvm_backend_test.py
+++ b/tests/qvm_backend_test.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Cambridge Quantum Computing
+# Copyright 2019-2024 Cambridge Quantum Computing
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.