diff --git a/README.md b/README.md
index 8fb6a21..dc6f6c0 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ c = nufft2(f, x, y, z)  # 3D
 This package, developed by Dan Foreman-Mackey is licensed under the Apache
 License, Version 2.0, with the following copyright:
 
-Copyright 2021 The Simons Foundation, Inc.
+Copyright 2021, 2022, 2023 The Simons Foundation, Inc.
 
 If you use this software, please cite the primary references listed on the
 [FINUFFT docs](https://finufft.readthedocs.io/en/latest/refs.html).
diff --git a/src/jax_finufft/__init__.py b/src/jax_finufft/__init__.py
index 931e67b..57997be 100644
--- a/src/jax_finufft/__init__.py
+++ b/src/jax_finufft/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 The Simons Foundation, Inc.
+# Copyright 2021, 2022, 2023 The Simons Foundation, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.