diff --git a/.github/workflows/gen_docs.yml b/.github/workflows/gen_docs.yml
index f3368b4..bab0fc8 100644
--- a/.github/workflows/gen_docs.yml
+++ b/.github/workflows/gen_docs.yml
@@ -18,7 +18,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v4
       - name: run-doxygen
-        uses: mattnotmitt/doxygen-action@v1.9.8
+        uses: mattnotmitt/doxygen-action@v1.12.0
         with:
           working-directory: doc
       - name: deploy-pages
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 663f61f..8113e73 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (c) 2024 by Cliff Green
+# Copyright (c) 2024-2025 by Cliff Green
 #
 # https://github.com/connectivecpp/periodic-timer
 #
diff --git a/cmake/download_asio_cpm.cmake b/cmake/download_asio_cpm.cmake
index 6251256..702d4f6 100644
--- a/cmake/download_asio_cpm.cmake
+++ b/cmake/download_asio_cpm.cmake
@@ -11,7 +11,7 @@ set ( THREADS_PREFER_PTHREAD_FLAG TRUE )
 find_package ( Threads REQUIRED )
 
 include ( cmake/download_cpm.cmake )
-CPMAddPackage ( "gh:chriskohlhoff/asio#asio-1-32-0@1.32.0" )
+CPMAddPackage ( "gh:chriskohlhoff/asio#asio-1-34-0@1.34.0" )
 
 # ASIO doesn't use CMake, we have to configure it manually. Extra notes for using on Windows:
 #
diff --git a/cmake/download_cpm.cmake b/cmake/download_cpm.cmake
index b4e123b..dd69ebe 100644
--- a/cmake/download_cpm.cmake
+++ b/cmake/download_cpm.cmake
@@ -4,7 +4,7 @@
 
 file(
   DOWNLOAD
-  https://github.com/cpm-cmake/CPM.cmake/releases/download/v0.39.0/CPM.cmake
+  https://github.com/cpm-cmake/CPM.cmake/releases/download/v0.40.0/CPM.cmake
   ${CMAKE_CURRENT_BINARY_DIR}/cmake/CPM.cmake
 )
 include(${CMAKE_CURRENT_BINARY_DIR}/cmake/CPM.cmake)
diff --git a/example/CMakeLists.txt b/example/CMakeLists.txt
index cf639cf..81e0112 100644
--- a/example/CMakeLists.txt
+++ b/example/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (c) 2024 by Cliff Green
+# Copyright (c) 2024-2025 by Cliff Green
 #
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
diff --git a/include/timer/periodic_timer.hpp b/include/timer/periodic_timer.hpp
index 1b3ce93..f025b00 100644
--- a/include/timer/periodic_timer.hpp
+++ b/include/timer/periodic_timer.hpp
@@ -73,7 +73,7 @@
  *
  * @author Cliff Green
  *
- * @copyright (c) 2017-2024 by Cliff Green
+ * @copyright (c) 2017-2025 by Cliff Green
  *
  * Distributed under the Boost Software License, Version 1.0. 
  * (See accompanying file LICENSE.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index e86db4e..056a092 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (c) 2024 by Cliff Green
+# Copyright (c) 2024-2025 by Cliff Green
 #
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
diff --git a/test/periodic_timer_test.cpp b/test/periodic_timer_test.cpp
index 3482329..66bce16 100644
--- a/test/periodic_timer_test.cpp
+++ b/test/periodic_timer_test.cpp
@@ -4,7 +4,7 @@
  *
  * @author Cliff Green
  *
- * @copyright (c) 2017-2024 by Cliff Green
+ * @copyright (c) 2017-2025 by Cliff Green
  *
  * Distributed under the Boost Software License, Version 1.0. 
  * (See accompanying file LICENSE.txt or copy at http://www.boost.org/LICENSE_1_0.txt)