diff --git a/.github/workflows/gen_docs.yml b/.github/workflows/gen_docs.yml
index e1f1c7d..a694aae 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: docs
       - name: deploy-pages
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/examples/CMakeLists.txt b/examples/CMakeLists.txt
index a7a5882..9039a54 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (c) 2024 by Cliff Green
+# Copyright (c) 2024-2025 by Cliff Green
 #
 # This CMake file invokes all of the example code CMake files for
 # the presentations repository. Each subdirectory can be built
diff --git a/examples/intro_generic_programming/CMakeLists.txt b/examples/intro_generic_programming/CMakeLists.txt
index 4419b6e..d9f0fb6 100644
--- a/examples/intro_generic_programming/CMakeLists.txt
+++ b/examples/intro_generic_programming/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/examples/std_span/CMakeLists.txt b/examples/std_span/CMakeLists.txt
index f599c8f..db4aab0 100644
--- a/examples/std_span/CMakeLists.txt
+++ b/examples/std_span/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/examples/unit_test_with_catch2/CMakeLists.txt b/examples/unit_test_with_catch2/CMakeLists.txt
index 79cd5b9..4709170 100644
--- a/examples/unit_test_with_catch2/CMakeLists.txt
+++ b/examples/unit_test_with_catch2/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)