diff --git a/pytket/extensions/cutensornet/__init__.py b/pytket/extensions/cutensornet/__init__.py
index f716ff92..5d12f155 100644
--- a/pytket/extensions/cutensornet/__init__.py
+++ b/pytket/extensions/cutensornet/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/backends/__init__.py b/pytket/extensions/cutensornet/backends/__init__.py
index 2bdfd2f2..54ae3aa7 100644
--- a/pytket/extensions/cutensornet/backends/__init__.py
+++ b/pytket/extensions/cutensornet/backends/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/backends/cutensornet_backend.py b/pytket/extensions/cutensornet/backends/cutensornet_backend.py
index 31777037..b6e13757 100644
--- a/pytket/extensions/cutensornet/backends/cutensornet_backend.py
+++ b/pytket/extensions/cutensornet/backends/cutensornet_backend.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/general.py b/pytket/extensions/cutensornet/general.py
index efa80aa8..97abf081 100644
--- a/pytket/extensions/cutensornet/general.py
+++ b/pytket/extensions/cutensornet/general.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/mps/__init__.py b/pytket/extensions/cutensornet/mps/__init__.py
index e2c3ec81..ccc950c9 100644
--- a/pytket/extensions/cutensornet/mps/__init__.py
+++ b/pytket/extensions/cutensornet/mps/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/mps/mps.py b/pytket/extensions/cutensornet/mps/mps.py
index b7334d72..6f072241 100644
--- a/pytket/extensions/cutensornet/mps/mps.py
+++ b/pytket/extensions/cutensornet/mps/mps.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/mps/mps_gate.py b/pytket/extensions/cutensornet/mps/mps_gate.py
index a5e322da..06864530 100644
--- a/pytket/extensions/cutensornet/mps/mps_gate.py
+++ b/pytket/extensions/cutensornet/mps/mps_gate.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/mps/mps_mpo.py b/pytket/extensions/cutensornet/mps/mps_mpo.py
index 2cb4e27d..6e1fa49a 100644
--- a/pytket/extensions/cutensornet/mps/mps_mpo.py
+++ b/pytket/extensions/cutensornet/mps/mps_mpo.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/mps/simulation.py b/pytket/extensions/cutensornet/mps/simulation.py
index 1d330013..79604570 100644
--- a/pytket/extensions/cutensornet/mps/simulation.py
+++ b/pytket/extensions/cutensornet/mps/simulation.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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/cutensornet/tensor_network_convert.py b/pytket/extensions/cutensornet/tensor_network_convert.py
index 0d9aad71..62394edd 100644
--- a/pytket/extensions/cutensornet/tensor_network_convert.py
+++ b/pytket/extensions/cutensornet/tensor_network_convert.py
@@ -1,4 +1,4 @@
-# Copyright 2019-2023 Quantinuum
+# Copyright 2019-2024 Quantinuum
 #
 # 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 8e7360ca..f0bc7c83 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# Copyright 2020-2023 Quantinuum
+# Copyright 2020-2024 Quantinuum
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.