diff --git a/js/TinyForwardingProperty.ts b/js/TinyForwardingProperty.ts
index 4f23aaf8..7107b2cd 100644
--- a/js/TinyForwardingProperty.ts
+++ b/js/TinyForwardingProperty.ts
@@ -1,4 +1,4 @@
-// Copyright 2020-2023, University of Colorado Boulder
+// Copyright 2020-2024, University of Colorado Boulder
 
 /**
  * A lightweight version of Property (that satisfies some of the interface), meant for high-performance applications
diff --git a/js/TinyForwardingPropertyTests.ts b/js/TinyForwardingPropertyTests.ts
index 5e8f008f..f989219d 100644
--- a/js/TinyForwardingPropertyTests.ts
+++ b/js/TinyForwardingPropertyTests.ts
@@ -1,4 +1,4 @@
-// Copyright 2021-2023, University of Colorado Boulder
+// Copyright 2021-2024, University of Colorado Boulder
 
 /**
  * QUnit tests for TinyForwardingProperty