diff --git a/js/neuron-config.js b/js/neuron-config.js
index 52f6fd6..90c7f75 100644
--- a/js/neuron-config.js
+++ b/js/neuron-config.js
@@ -1,4 +1,4 @@
-// Copyright 2019, University of Colorado Boulder
+// Copyright 2014-2019, University of Colorado Boulder
 
 /*
  * IMPORTANT: This file was auto-generated by "grunt generate-config". Please do not modify this directly. Instead
diff --git a/js/neuron-main.js b/js/neuron-main.js
index cd72771..a320793 100644
--- a/js/neuron-main.js
+++ b/js/neuron-main.js
@@ -1,4 +1,4 @@
-// Copyright 2014-2017, University of Colorado Boulder
+// Copyright 2014-2019, University of Colorado Boulder
 
 /**
  * Main entry point for the neuron sim.
diff --git a/js/neuron/model/NeuronModel.js b/js/neuron/model/NeuronModel.js
index e203110..619d8d7 100644
--- a/js/neuron/model/NeuronModel.js
+++ b/js/neuron/model/NeuronModel.js
@@ -1,4 +1,4 @@
-// Copyright 2014-2018, University of Colorado Boulder
+// Copyright 2014-2019, University of Colorado Boulder
 /**
  * Model for the 'Neuron' screen. This class represents the main class for modeling the axon.  It acts as the central
  * location where the interaction between the membrane, the particles (i.e. ions), and the gates is all governed.
diff --git a/js/neuron/view/controlpanel/SimSpeedControlPanel.js b/js/neuron/view/controlpanel/SimSpeedControlPanel.js
index 6fb6161..ac68f31 100644
--- a/js/neuron/view/controlpanel/SimSpeedControlPanel.js
+++ b/js/neuron/view/controlpanel/SimSpeedControlPanel.js
@@ -1,4 +1,4 @@
-// Copyright 2014-2018, University of Colorado Boulder
+// Copyright 2014-2019, University of Colorado Boulder
 
 /**
  * Control panel for choosing the sim speed