diff --git a/include/lbfgs.h b/include/lbfgs.h
index a19eb1d..eae5c5c 100644
--- a/include/lbfgs.h
+++ b/include/lbfgs.h
@@ -2,7 +2,7 @@
  *      C library of Limited memory BFGS (L-BFGS).
  *
  * Copyright (c) 1990, Jorge Nocedal
- * Copyright (c) 2007,2008,2009 Naoaki Okazaki
+ * Copyright (c) 2007,2008,2009,2010 Naoaki Okazaki
  * All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
diff --git a/lib/arithmetic_ansi.h b/lib/arithmetic_ansi.h
index 159cfb0..2c3bf44 100644
--- a/lib/arithmetic_ansi.h
+++ b/lib/arithmetic_ansi.h
@@ -1,7 +1,7 @@
 /*
  *      ANSI C implementation of vector operations.
  *
- * Copyright (c) 2007,2008,2009 Naoaki Okazaki
+ * Copyright (c) 2007,2008,2009,2010 Naoaki Okazaki
  * All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
diff --git a/lib/arithmetic_sse_double.h b/lib/arithmetic_sse_double.h
index 96c1547..6c955ce 100644
--- a/lib/arithmetic_sse_double.h
+++ b/lib/arithmetic_sse_double.h
@@ -1,7 +1,7 @@
 /*
  *      SSE2 implementation of vector oprations (64bit double).
  *
- * Copyright (c) 2007,2008,2009 Naoaki Okazaki
+ * Copyright (c) 2007,2008,2009,2010 Naoaki Okazaki
  * All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
diff --git a/lib/arithmetic_sse_float.h b/lib/arithmetic_sse_float.h
index 8818862..ef13782 100644
--- a/lib/arithmetic_sse_float.h
+++ b/lib/arithmetic_sse_float.h
@@ -1,7 +1,7 @@
 /*
  *      SSE/SSE3 implementation of vector oprations (32bit float).
  *
- * Copyright (c) 2007,2008,2009 Naoaki Okazaki
+ * Copyright (c) 2007,2008,2009,2010 Naoaki Okazaki
  * All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy