diff --git a/CMakeLists.txt b/CMakeLists.txt
index 671abb4..f8d74b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,12 +7,12 @@ add_subdirectory(RTNeural)
 
 include(cmake/SIMDExtensions.cmake)
 include(cmake/ChooseBackend.cmake)
-include(cmake/CPM.cmake)
-include(cmake/Testing.cmake)
 
 option(BUILD_TESTS "Build RTNeural accuracy tests" OFF)
 if(BUILD_TESTS)
     message(STATUS "RTNeural -- Configuring tests...")
+    include(cmake/CPM.cmake)
+    include(cmake/Testing.cmake)
     rtneural_setup_testing()
     add_subdirectory(tests)
 endif()
diff --git a/cmake/CPM.cmake b/cmake/CPM.cmake
index ad6b74a..f299121 100644
--- a/cmake/CPM.cmake
+++ b/cmake/CPM.cmake
@@ -2,8 +2,8 @@
 #
 # SPDX-FileCopyrightText: Copyright (c) 2019-2023 Lars Melchior and contributors
 
-set(CPM_DOWNLOAD_VERSION 0.38.6)
-set(CPM_HASH_SUM "11c3fa5f1ba14f15d31c2fb63dbc8628ee133d81c8d764caad9a8db9e0bacb07")
+set(CPM_DOWNLOAD_VERSION 0.40.2)
+set(CPM_HASH_SUM "c8cdc32c03816538ce22781ed72964dc864b2a34a310d3b7104812a5ca2d835d")
 
 if(CPM_SOURCE_CACHE)
   set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
@@ -17,8 +17,8 @@ endif()
 get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
 
 file(DOWNLOAD
-     https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
-     ${CPM_DOWNLOAD_LOCATION} EXPECTED_HASH SHA256=${CPM_HASH_SUM}
+        https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+        ${CPM_DOWNLOAD_LOCATION} EXPECTED_HASH SHA256=${CPM_HASH_SUM}
 )
 
 include(${CPM_DOWNLOAD_LOCATION})