diff --git a/cpreproc.py b/cpreproc.py
index fceff74..aa67d53 100644
--- a/cpreproc.py
+++ b/cpreproc.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslbasefuncs.py b/lslopt/lslbasefuncs.py
index 3f3fe8f..51051fb 100644
--- a/lslopt/lslbasefuncs.py
+++ b/lslopt/lslbasefuncs.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslcommon.py b/lslopt/lslcommon.py
index cdfc13f..e8e9fcc 100644
--- a/lslopt/lslcommon.py
+++ b/lslopt/lslcommon.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lsldeadcode.py b/lslopt/lsldeadcode.py
index aec0ac7..daffc5d 100644
--- a/lslopt/lsldeadcode.py
+++ b/lslopt/lsldeadcode.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslextrafuncs.py b/lslopt/lslextrafuncs.py
index 75bda37..1728fac 100644
--- a/lslopt/lslextrafuncs.py
+++ b/lslopt/lslextrafuncs.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslfoldconst.py b/lslopt/lslfoldconst.py
index 5e87250..f9df5f0 100644
--- a/lslopt/lslfoldconst.py
+++ b/lslopt/lslfoldconst.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslfuncopt.py b/lslopt/lslfuncopt.py
index d6cba62..9e44342 100644
--- a/lslopt/lslfuncopt.py
+++ b/lslopt/lslfuncopt.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslfuncs.py b/lslopt/lslfuncs.py
index 4df0789..51666ad 100644
--- a/lslopt/lslfuncs.py
+++ b/lslopt/lslfuncs.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslinliner.py b/lslopt/lslinliner.py
index afa5cb0..09e0184 100644
--- a/lslopt/lslinliner.py
+++ b/lslopt/lslinliner.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lsljson.py b/lslopt/lsljson.py
index 7eaf7cb..84651cc 100644
--- a/lslopt/lsljson.py
+++ b/lslopt/lsljson.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lsllastpass.py b/lslopt/lsllastpass.py
index 5f77874..43fd2ce 100644
--- a/lslopt/lsllastpass.py
+++ b/lslopt/lsllastpass.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslloadlib.py b/lslopt/lslloadlib.py
index 3d60ba1..06998b8 100644
--- a/lslopt/lslloadlib.py
+++ b/lslopt/lslloadlib.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lsloptimizer.py b/lslopt/lsloptimizer.py
index 2bc5338..e2d96f8 100644
--- a/lslopt/lsloptimizer.py
+++ b/lslopt/lsloptimizer.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lsloutput.py b/lslopt/lsloutput.py
index 33d08d4..dbe6d84 100644
--- a/lslopt/lsloutput.py
+++ b/lslopt/lsloutput.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslparse.py b/lslopt/lslparse.py
index 1935908..0a9422f 100644
--- a/lslopt/lslparse.py
+++ b/lslopt/lslparse.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/lslopt/lslrenamer.py b/lslopt/lslrenamer.py
index fa2d80f..99555a6 100644
--- a/lslopt/lslrenamer.py
+++ b/lslopt/lslrenamer.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/main.py b/main.py
index 1af7455..9de1291 100755
--- a/main.py
+++ b/main.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python2
 #
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
@@ -205,7 +205,7 @@ def Usage(progname, about = None):
         werr(
 u"""LSL optimizer v{version}
 
-    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 
     This program comes with ABSOLUTELY NO WARRANTY.
     This is free software, and you are welcome to redistribute it
diff --git a/run-tests.py b/run-tests.py
index d7e55e2..8d913e9 100755
--- a/run-tests.py
+++ b/run-tests.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python2
 #
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #
diff --git a/strutil.py b/strutil.py
index 4986600..1995d4b 100644
--- a/strutil.py
+++ b/strutil.py
@@ -1,4 +1,4 @@
-#    (C) Copyright 2015-2020 Sei Lisa. All rights reserved.
+#    (C) Copyright 2015-2021 Sei Lisa. All rights reserved.
 #
 #    This file is part of LSL PyOptimizer.
 #