diff --git a/COPYRIGHT b/COPYRIGHT
index 6ed2bc13..de5fe165 100755
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,5 +1,5 @@
 
-Copyright (C) 2003-2024
+Copyright (C) 2003-2026
      Noriaki Ando and the OpenRTM-aist Project team
      Intelligent Systems Research Institute,
      National Institute of Advanced Industrial Science and Technology (AIST),
diff --git a/OpenRTM_aist/Manager.py b/OpenRTM_aist/Manager.py
index d3599334..6996e210 100644
--- a/OpenRTM_aist/Manager.py
+++ b/OpenRTM_aist/Manager.py
@@ -1692,9 +1692,9 @@ def initLogger(self):
 
         self._rtcout.RTC_INFO(
             "%s", self._config.getProperty("openrtm.version"))
-        self._rtcout.RTC_INFO("Copyright (C) 2003-2024, Noriaki Ando and OpenRTM development team,")
+        self._rtcout.RTC_INFO("Copyright (C) 2003-2026, Noriaki Ando and OpenRTM development team,")
         self._rtcout.RTC_INFO("  Intelligent Systems Research Institute, AIST,")
-        self._rtcout.RTC_INFO("Copyright (C) 2024, Noriaki Ando and OpenRTM development team,")
+        self._rtcout.RTC_INFO("Copyright (C) 2026, Noriaki Ando and OpenRTM development team,")
         self._rtcout.RTC_INFO("  Industrial Cyber-Physical Research Center, AIST,")
         self._rtcout.RTC_INFO("  All right reserved.")
         self._rtcout.RTC_INFO("Manager starting.")