diff --git a/src/diffpy/pdfgui/control/fitstructure.py b/src/diffpy/pdfgui/control/fitstructure.py
index 515fdec5..5eb82842 100644
--- a/src/diffpy/pdfgui/control/fitstructure.py
+++ b/src/diffpy/pdfgui/control/fitstructure.py
@@ -3,7 +3,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Pavol Juhas
diff --git a/src/diffpy/pdfgui/control/organizer.py b/src/diffpy/pdfgui/control/organizer.py
index ecf140b8..901ef26a 100644
--- a/src/diffpy/pdfgui/control/organizer.py
+++ b/src/diffpy/pdfgui/control/organizer.py
@@ -3,7 +3,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Jiwu Liu
diff --git a/src/diffpy/pdfgui/control/pdfguicontrol.py b/src/diffpy/pdfgui/control/pdfguicontrol.py
index 15632a0d..f8a6896a 100644
--- a/src/diffpy/pdfgui/control/pdfguicontrol.py
+++ b/src/diffpy/pdfgui/control/pdfguicontrol.py
@@ -3,7 +3,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Jiwu Liu
diff --git a/src/diffpy/pdfgui/control/plotter.py b/src/diffpy/pdfgui/control/plotter.py
index aeba7d6b..29957301 100644
--- a/src/diffpy/pdfgui/control/plotter.py
+++ b/src/diffpy/pdfgui/control/plotter.py
@@ -3,7 +3,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Jiwu Liu
diff --git a/src/diffpy/pdfgui/gui/dopingseriespanel.py b/src/diffpy/pdfgui/gui/dopingseriespanel.py
index fd60c1bf..723aafe3 100644
--- a/src/diffpy/pdfgui/gui/dopingseriespanel.py
+++ b/src/diffpy/pdfgui/gui/dopingseriespanel.py
@@ -4,7 +4,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Chris Farrow
diff --git a/src/diffpy/pdfgui/gui/errorreportdialog.py b/src/diffpy/pdfgui/gui/errorreportdialog.py
index 7e554ac6..e342a769 100644
--- a/src/diffpy/pdfgui/gui/errorreportdialog.py
+++ b/src/diffpy/pdfgui/gui/errorreportdialog.py
@@ -4,7 +4,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Dmitriy Bryndin
diff --git a/src/diffpy/pdfgui/gui/errorreportdialog_control_fix.py b/src/diffpy/pdfgui/gui/errorreportdialog_control_fix.py
index c2d91812..3f23b17b 100644
--- a/src/diffpy/pdfgui/gui/errorreportdialog_control_fix.py
+++ b/src/diffpy/pdfgui/gui/errorreportdialog_control_fix.py
@@ -4,7 +4,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Dmitriy Bryndin
diff --git a/src/diffpy/pdfgui/gui/extendedplotframe.py b/src/diffpy/pdfgui/gui/extendedplotframe.py
index 297a7670..ab056211 100644
--- a/src/diffpy/pdfgui/gui/extendedplotframe.py
+++ b/src/diffpy/pdfgui/gui/extendedplotframe.py
@@ -3,7 +3,7 @@
 #
 # PDFgui            by DANSE Diffraction group
 #                   Simon J. L. Billinge
-#                   (c) 2006 trustees of the Michigan State University.
+#                   (c) 2006-2024 trustees of the Michigan State University.
 #                   All rights reserved.
 #
 # File coded by:    Jiwu Liu, Chris Farrow