diff --git a/camera.lua b/camera.lua
index f8e4256..d40b823 100644
--- a/camera.lua
+++ b/camera.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2010-2012 Matthias Richter
+Copyright (c) 2010-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/class.lua b/class.lua
index a58c1a6..438ac9b 100644
--- a/class.lua
+++ b/class.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2010-2012 Matthias Richter
+Copyright (c) 2010-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/gamestate.lua b/gamestate.lua
index c5dce11..db86c4c 100644
--- a/gamestate.lua
+++ b/gamestate.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2010-2012 Matthias Richter
+Copyright (c) 2010-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/ringbuffer.lua b/ringbuffer.lua
index f68c613..86b0dd8 100644
--- a/ringbuffer.lua
+++ b/ringbuffer.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2010-2012 Matthias Richter
+Copyright (c) 2010-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/signal.lua b/signal.lua
index 3aefa4b..7cb246e 100644
--- a/signal.lua
+++ b/signal.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2012 Matthias Richter
+Copyright (c) 2012-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/timer.lua b/timer.lua
index 7c6bcaf..485f691 100644
--- a/timer.lua
+++ b/timer.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2010-2012 Matthias Richter
+Copyright (c) 2010-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/vector-light.lua b/vector-light.lua
index 5e90c63..7cbd4d6 100644
--- a/vector-light.lua
+++ b/vector-light.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2012 Matthias Richter
+Copyright (c) 2012-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/vector.lua b/vector.lua
index be0e3ef..71260bf 100644
--- a/vector.lua
+++ b/vector.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2010-2012 Matthias Richter
+Copyright (c) 2010-2013 Matthias Richter
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal