diff --git a/js/demo/sim-like-components/model/Ball.ts b/js/demo/sim-like-components/model/Ball.ts
index 0f21ba54..c26e632f 100644
--- a/js/demo/sim-like-components/model/Ball.ts
+++ b/js/demo/sim-like-components/model/Ball.ts
@@ -1,4 +1,4 @@
-// Copyright 2018-2021, University of Colorado Boulder
+// Copyright 2018-2022, University of Colorado Boulder
 
 /**
  * simple model of a ball
diff --git a/js/demo/sim-like-components/model/SimLikeComponentsModel.ts b/js/demo/sim-like-components/model/SimLikeComponentsModel.ts
index ed5b5c50..6653d9ac 100644
--- a/js/demo/sim-like-components/model/SimLikeComponentsModel.ts
+++ b/js/demo/sim-like-components/model/SimLikeComponentsModel.ts
@@ -1,4 +1,4 @@
-// Copyright 2018-2020, University of Colorado Boulder
+// Copyright 2018-2022, University of Colorado Boulder
 
 /**
  * A model that exists only for the purposes of demonstrating sonification, particularly how view and model elements are
diff --git a/js/demo/sim-like-components/view/SimLikeComponentsScreenView.ts b/js/demo/sim-like-components/view/SimLikeComponentsScreenView.ts
index 6fed68e5..73bb32f1 100644
--- a/js/demo/sim-like-components/view/SimLikeComponentsScreenView.ts
+++ b/js/demo/sim-like-components/view/SimLikeComponentsScreenView.ts
@@ -1,4 +1,4 @@
-// Copyright 2018-2021, University of Colorado Boulder
+// Copyright 2018-2022, University of Colorado Boulder
 
 /**
  * view for a screen that demonstrates views and sounds for components that interact with the model in some way
diff --git a/js/sound-generators/PitchedPopGenerator.js b/js/sound-generators/PitchedPopGenerator.js
index e3401d1c..cd5cf8d6 100644
--- a/js/sound-generators/PitchedPopGenerator.js
+++ b/js/sound-generators/PitchedPopGenerator.js
@@ -1,4 +1,4 @@
-// Copyright 2018-2020, University of Colorado Boulder
+// Copyright 2018-2022, University of Colorado Boulder
 
 /**
  * sound generator that produces a popping sound with controllable pitch