diff --git a/decode.cpp b/decode.cpp
index 5803071..cb84155 100644
--- a/decode.cpp
+++ b/decode.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/decode.h b/decode.h
index 54a8da7..e01b468 100644
--- a/decode.h
+++ b/decode.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/document.cpp b/document.cpp
index 5046af1..dae7106 100644
--- a/document.cpp
+++ b/document.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/document.h b/document.h
index 900b20e..d2e3fa1 100644
--- a/document.h
+++ b/document.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/keymap.h b/keymap.h
index 4062f84..8a5c74e 100644
--- a/keymap.h
+++ b/keymap.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/levelonecommands.cpp b/levelonecommands.cpp
index 6205c82..1e09b76 100644
--- a/levelonecommands.cpp
+++ b/levelonecommands.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/levelonecommands.h b/levelonecommands.h
index db35864..45945c2 100644
--- a/levelonecommands.h
+++ b/levelonecommands.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/levelonepage.cpp b/levelonepage.cpp
index f29f489..1e160cc 100644
--- a/levelonepage.cpp
+++ b/levelonepage.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/levelonepage.h b/levelonepage.h
index 1b0a257..9c3bf99 100644
--- a/levelonepage.h
+++ b/levelonepage.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/loadsave.cpp b/loadsave.cpp
index d732f8d..3bfa469 100644
--- a/loadsave.cpp
+++ b/loadsave.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/loadsave.h b/loadsave.h
index 4fc7011..567ca5c 100644
--- a/loadsave.h
+++ b/loadsave.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/main.cpp b/main.cpp
index b5db06a..0138e18 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/mainwidget.cpp b/mainwidget.cpp
index 14f17ab..7fedd87 100644
--- a/mainwidget.cpp
+++ b/mainwidget.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/mainwidget.h b/mainwidget.h
index 7549a1f..7eab007 100644
--- a/mainwidget.h
+++ b/mainwidget.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 8c06c16..dca9593 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
@@ -246,7 +246,7 @@ void MainWindow::about()
 	QMessageBox::about(this, tr("About"), QString("<b>%1</b><br>"
 	"An open source Level 2.5 teletext page editor.<br>"
 	"<i>Version %2</i><br><br>"
-	"Copyright (C) 2020-2022 Gavin MacGregor<br><br>"
+	"Copyright (C) 2020-2023 Gavin MacGregor<br><br>"
 	"Released under the GNU General Public License version 3<br>"
 	"<a href=\"https://github.com/gkthemac/qteletextmaker\">https://github.com/gkthemac/qteletextmaker</a>").arg(QApplication::applicationDisplayName()).arg(QApplication::applicationVersion()));
 }
diff --git a/mainwindow.h b/mainwindow.h
index a00fa8e..daba107 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pagebase.cpp b/pagebase.cpp
index 782fa1f..f245c0b 100644
--- a/pagebase.cpp
+++ b/pagebase.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pagebase.h b/pagebase.h
index ef0408c..a182d72 100644
--- a/pagebase.h
+++ b/pagebase.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pagecomposelinksdockwidget.cpp b/pagecomposelinksdockwidget.cpp
index e76600e..ad4349f 100644
--- a/pagecomposelinksdockwidget.cpp
+++ b/pagecomposelinksdockwidget.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pagecomposelinksdockwidget.h b/pagecomposelinksdockwidget.h
index 54299fb..04e1f93 100644
--- a/pagecomposelinksdockwidget.h
+++ b/pagecomposelinksdockwidget.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pageenhancementsdockwidget.cpp b/pageenhancementsdockwidget.cpp
index 061b988..921b5fc 100644
--- a/pageenhancementsdockwidget.cpp
+++ b/pageenhancementsdockwidget.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pageenhancementsdockwidget.h b/pageenhancementsdockwidget.h
index 44c9ca9..8313e16 100644
--- a/pageenhancementsdockwidget.h
+++ b/pageenhancementsdockwidget.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pageoptionsdockwidget.cpp b/pageoptionsdockwidget.cpp
index a56ed6a..04548e0 100644
--- a/pageoptionsdockwidget.cpp
+++ b/pageoptionsdockwidget.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pageoptionsdockwidget.h b/pageoptionsdockwidget.h
index 201c3dd..ceb2d92 100644
--- a/pageoptionsdockwidget.h
+++ b/pageoptionsdockwidget.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pagex26base.cpp b/pagex26base.cpp
index 19bcaaa..8c0f2fd 100644
--- a/pagex26base.cpp
+++ b/pagex26base.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/pagex26base.h b/pagex26base.h
index f61db63..02c0572 100644
--- a/pagex26base.h
+++ b/pagex26base.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/palettedockwidget.cpp b/palettedockwidget.cpp
index 553371d..956befc 100644
--- a/palettedockwidget.cpp
+++ b/palettedockwidget.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/palettedockwidget.h b/palettedockwidget.h
index 4a901f2..e8b23ee 100644
--- a/palettedockwidget.h
+++ b/palettedockwidget.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/render.cpp b/render.cpp
index 63dd255..5cd0174 100644
--- a/render.cpp
+++ b/render.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/render.h b/render.h
index e9764d2..136d3d9 100644
--- a/render.h
+++ b/render.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26commands.cpp b/x26commands.cpp
index 023d3fb..37f6b11 100644
--- a/x26commands.cpp
+++ b/x26commands.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26commands.h b/x26commands.h
index d490ad9..8fe3804 100644
--- a/x26commands.h
+++ b/x26commands.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26dockwidget.cpp b/x26dockwidget.cpp
index 7cbfa73..3904a3b 100644
--- a/x26dockwidget.cpp
+++ b/x26dockwidget.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26dockwidget.h b/x26dockwidget.h
index 3fe4041..b9d5288 100644
--- a/x26dockwidget.h
+++ b/x26dockwidget.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26model.cpp b/x26model.cpp
index e77a5e0..4a2ca59 100644
--- a/x26model.cpp
+++ b/x26model.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26model.h b/x26model.h
index 04d5cc5..2428aa0 100644
--- a/x26model.h
+++ b/x26model.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26triplets.cpp b/x26triplets.cpp
index 7493632..765a86e 100644
--- a/x26triplets.cpp
+++ b/x26triplets.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *
diff --git a/x26triplets.h b/x26triplets.h
index b322929..6fcb803 100644
--- a/x26triplets.h
+++ b/x26triplets.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020-2022 Gavin MacGregor
+ * Copyright (C) 2020-2023 Gavin MacGregor
  *
  * This file is part of QTeletextMaker.
  *