diff --git a/README.md b/README.md
index 39897df..e33a649 100644
--- a/README.md
+++ b/README.md
@@ -24,9 +24,9 @@ Asynchronous timers from Asio are relatively easy to use. However, there are no
 
 The generated Doxygen documentation for `periodic_timer` is [here](https://connectivecpp.github.io/periodic-timer/).
 
-## Dependencies
+## Library Dependencies
 
-The `periodic_timer` header file has the stand-alone Asio library for a dependency. Specific version (or branch) specs for the Asio dependency is in `cmake/download_asio_cpm.cmake`.
+The `periodic_timer` header file has the stand-alone Asio library for a dependency. Specific version (or branch) specs for the Asio dependency is in [`cmake/download_asio_cpm.cmake`](cmake/download_asio_cpm.cmake).
 
 ## C++ Standard
 
diff --git a/cmake/download_asio_cpm.cmake b/cmake/download_asio_cpm.cmake
index 93df15b..c4c6f3d 100644
--- a/cmake/download_asio_cpm.cmake
+++ b/cmake/download_asio_cpm.cmake
@@ -10,7 +10,7 @@ set ( CMAKE_THREAD_PREFER_PTHREAD TRUE )
 set ( THREADS_PREFER_PTHREAD_FLAG TRUE )
 find_package ( Threads REQUIRED )
 
-CPMAddPackage ( "gh:chriskohlhoff/asio#asio-1-34-0@1.34.0" )
+CPMAddPackage ( "gh:chriskohlhoff/asio#asio-1-36-0@1.36.0" )
 
 # 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 dd69ebe..6d7718c 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/v0.40.0/CPM.cmake
+  https://github.com/cpm-cmake/CPM.cmake/releases/download/v0.42.0/CPM.cmake
   ${CMAKE_CURRENT_BINARY_DIR}/cmake/CPM.cmake
 )
 include(${CMAKE_CURRENT_BINARY_DIR}/cmake/CPM.cmake)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 056a092..e7b95b2 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -15,7 +15,7 @@ target_compile_features ( periodic_timer_test PRIVATE cxx_std_20 )
 # add dependencies
 include ( ../cmake/download_cpm.cmake )
 
-CPMAddPackage ( "gh:catchorg/Catch2@3.8.0" )
+CPMAddPackage ( "gh:catchorg/Catch2@3.11.0" )
 
 set ( CMAKE_THREAD_PREFER_PTHREAD TRUE )
 set ( THREADS_PREFER_PTHREAD_FLAG TRUE )
diff --git a/test/periodic_timer_test.cpp b/test/periodic_timer_test.cpp
index 66bce16..2df689a 100644
--- a/test/periodic_timer_test.cpp
+++ b/test/periodic_timer_test.cpp
@@ -47,7 +47,7 @@ void wait_util (std::chrono::milliseconds ms, wk_guard& wg, std::thread& thr) {
 template <typename Clock>
 void test_util () {
 
-  GIVEN ( "A clock and a duration") {
+  SECTION ( "Setup clock and duration") {
 
     asio::io_context ioc;
     chops::periodic_timer<Clock> timer {ioc};
@@ -56,7 +56,7 @@ void test_util () {
     std::thread thr([&ioc] () { ioc.run(); } );
     count = 0;
 
-    WHEN ( "The duration is 100 ms" ) {
+    SECTION ( "100 ms duration" ) {
       auto test_dur { 100 };
       timer.start_duration_timer(std::chrono::milliseconds(test_dur),
         [] (std::error_code err, typename Clock::duration elap) { 
@@ -66,11 +66,9 @@ void test_util () {
 
       wait_util (std::chrono::milliseconds((Expected+1)*test_dur), wg, thr);
 
-      THEN ( "the timer callback count should match expected") {
-        REQUIRE (count == Expected);
-      }
+      REQUIRE (count == Expected);
     }
-    WHEN ( "The duration is 200 ms and the start time is 2 seconds in the future" ) {
+    SECTION ( "200 ms duration, start time is 2 seconds in the future" ) {
       auto test_dur { 200 };
       timer.start_duration_timer(std::chrono::milliseconds(test_dur), Clock::now() + std::chrono::seconds(2),
         [] (std::error_code err, typename Clock::duration elap) { 
@@ -80,11 +78,9 @@ void test_util () {
 
       wait_util(std::chrono::milliseconds((Expected+1)*test_dur + 2000), wg, thr);
 
-      THEN ( "the timer callback count should match expected") {
-        REQUIRE (count == Expected);
-      }
+      REQUIRE (count == Expected);
     }
-    WHEN ( "The duration is 100 ms and the timer pops on timepoints" ) {
+    SECTION ( "100 ms duration, timer pops on timepoints" ) {
       auto test_dur { 100 };
       timer.start_timepoint_timer(std::chrono::milliseconds(test_dur),
         [] (std::error_code err, typename Clock::duration elap) { 
@@ -94,11 +90,9 @@ void test_util () {
 
       wait_util (std::chrono::milliseconds((Expected+1)*test_dur), wg, thr);
 
-      THEN ( "the timer callback count should match expected") {
-        REQUIRE (count == Expected);
-      }
+      REQUIRE (count == Expected);
     }
-    WHEN ( "The duration is 200 ms and the timer pops on timepoints starting 2 seconds in the future" ) {
+    SECTION ( "200 ms duration, timer pops on timepoints starting 2 seconds in the future" ) {
       auto test_dur { 200 };
       timer.start_timepoint_timer(std::chrono::milliseconds(test_dur), Clock::now() + std::chrono::seconds(2),
         [] (std::error_code err, typename Clock::duration elap) { 
@@ -108,25 +102,23 @@ void test_util () {
 
       wait_util(std::chrono::milliseconds((Expected+1)*test_dur + 2000), wg, thr);
 
-      THEN ( "the timer callback count should match expected") {
-        REQUIRE (count == Expected);
-      }
+      REQUIRE (count == Expected);
     }
 
-  } // end given
+  }
 }
 
-SCENARIO ( "A periodic timer can be instantiated on the steady clock", "[periodic_timer] [steady_clock]" ) {
+TEST_CASE ( "Steady clock periodic timer", "[periodic_timer] [steady_clock]" ) {
 
   test_util<std::chrono::steady_clock>();
 
 }
-SCENARIO ( "A periodic timer can be instantiated on the system clock", "[periodic_timer] [system_clock]" ) {
+TEST_CASE ( "System clock periodic timer", "[periodic_timer] [system_clock]" ) {
 
   test_util<std::chrono::system_clock>();
 
 }
-SCENARIO ( "A periodic timer can be instantiated on the high resolution clock", "[periodic_timer] [high_resolution_clock]" ) {
+TEST_CASE ( "High resolution clock periodic timer", "[periodic_timer] [high_resolution_clock]" ) {
 
   test_util<std::chrono::high_resolution_clock>();