diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5f2487c0..d9ebc3f7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ name: CI
 
 on:
   push:
-    branches: ["master"]
+    branches: ["master", "0.7-dev"]
   pull_request:
 
 jobs:
@@ -63,6 +63,7 @@ jobs:
           cmake \
             --build $RESTINIO_BUILD_DIR \
             --config ${{ matrix.build_type }} \
+            --parallel ${NUMBER_OF_PROCESSORS} \
             --verbose
       - name: Test
         shell: bash
@@ -77,76 +78,137 @@ jobs:
 
   Build-Linux:
     # The type of runner that the job will run on
-    name: Ubuntu-22.04 (${{ matrix.compiler.cname }}, ${{ matrix.build_type }}, C++${{ matrix.compiler.cppstd }})
+    name: Ubuntu-22.04 (${{ matrix.build_settings.toolset }}-${{ matrix.build_settings.toolset_version }}, ${{ matrix.build_type }}, C++${{ matrix.build_settings.cppstd }}, ${{matrix.build_settings.asio_source}} asio)
     runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
-        compiler:
-          - cname: gcc-9
-            cxxname: g++-9
-            ar: gcc-ar-9
+        build_settings:
+          - toolset: gcc
+            toolset_version: 9
             cppstd: 17
+            asio_source: standalone
 
-          - cname: gcc-12
-            cxxname: g++-12
-            ar: gcc-ar-12
+          - toolset: gcc
+            toolset_version: 9
             cppstd: 17
-          - cname: gcc-12
-            cxxname: g++-12
-            ar: gcc-ar-12
+            asio_source: boost
+
+          - toolset: gcc
+            toolset_version: 9
+            cppstd: 17
+            asio_source: boost-system-package
+
+          - toolset: gcc
+            toolset_version: 12
+            cppstd: 17
+            asio_source: standalone
+          - toolset: gcc
+            toolset_version: 12
             cppstd: 20
+            asio_source: standalone
+          - toolset: gcc
+            toolset_version: 12
+            cppstd: 20
+            asio_source: boost
 
-          - cname: clang-13
-            cxxname: clang++-13
-            ar: llvm-ar-13
+          - toolset: clang
+            toolset_version: 13
             cppstd: 17
+            asio_source: standalone
 
-          - cname: clang-15
-            cxxname: clang++-15
-            ar: llvm-ar-15
+          - toolset: clang
+            toolset_version: 15
             cppstd: 17
-          - cname: clang-15
-            cxxname: clang++-15
-            ar: llvm-ar-15
+            asio_source: standalone
+          - toolset: clang
+            toolset_version: 15
             cppstd: 20
+            asio_source: standalone
 
         build_type:
           - Release
           - Debug
     env:
-      CC: ${{ matrix.compiler.cname }}
-      CXX: ${{ matrix.compiler.cxxname }}
-      AR: ${{ matrix.compiler.ar }}
-      RESTINIO_BUILD_DIR: _build_${{ matrix.compiler.cname }}_cpp${{ matrix.compiler.cppstd }}_${{ matrix.build_type }}
+      RESTINIO_BUILD_TAG: ${{ matrix.build_settings.toolset }}-${{ matrix.build_settings.toolset_version }}_cpp${{ matrix.build_settings.cppstd }}_${{ matrix.build_type }}_${{matrix.build_settings.asio_source}}_asio
     steps:
       - uses: actions/checkout@v3
 
-      - name: Print env
+      - name: Prepare env
         run: |
           echo github.event.action: ${{ github.event.action }}
           echo github.event_name: ${{ github.event_name }}
+          echo "RESTINIO_BUILD_DIR=_build_${RESTINIO_BUILD_TAG}" >> $GITHUB_ENV
+          echo "CC=${{ matrix.build_settings.toolset }}-${{ matrix.build_settings.toolset_version }}" >> $GITHUB_ENV
+          if [ "${{ matrix.build_settings.toolset }}" == "gcc" ]; then
+              echo "CXX=g++-${{ matrix.build_settings.toolset_version }}" >> $GITHUB_ENV
+              echo "AR=gcc-ar-${{ matrix.build_settings.toolset_version }}" >> $GITHUB_ENV
+          else
+              echo "CXX=clang++-${{ matrix.build_settings.toolset_version }}" >> $GITHUB_ENV
+              echo "AR=llvm-ar-${{ matrix.build_settings.toolset_version }}" >> $GITHUB_ENV
+          fi
 
       - name: Install dependencies
         run: |
           sudo gem install Mxx_ru
+          if [ "${{ matrix.build_settings.asio_source }}" == "boost-system-package" ]; then
+              sudo apt-get update && sudo apt-get install -y libboost-all-dev
+          fi
+          mxxruexternals
 
       - name: Configure
+        if: ${{ matrix.build_settings.asio_source == 'standalone' }}
+        shell: bash
+        run: |
+          cd dev
+          cmake \
+            -B ${RESTINIO_BUILD_DIR} \
+            -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
+            -DRESTINIO_EXPLICIT_CPPSTD=${{ matrix.build_settings.cppstd }} \
+            -DRESTINIO_TEST_SUFFIX=" [${RESTINIO_BUILD_TAG}]"
+
+      - name: Obtain Boost
+        if: ${{ matrix.build_settings.asio_source == 'boost' }}
+        uses: MarkusJx/install-boost@v2.4.4
+        id: install-boost
+        with:
+            boost_version: 1.83.0
+            boost_install_dir: ${{github.workspace}}/local_boost
+            toolset: ${{ matrix.build_settings.toolset }}
+            platform_version: 22.04
+
+      - name: Configure
+        if: ${{ matrix.build_settings.asio_source == 'boost' }}
         shell: bash
         run: |
-          mxxruexternals
           cd dev
           cmake \
             -B ${RESTINIO_BUILD_DIR} \
             -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
-            -DRESTINIO_EXPLICIT_CPPSTD=${{ matrix.compiler.cppstd }} \
-            -DRESTINIO_TEST_SUFFIX=" [${{ matrix.compiler.cname }}_cpp${{ matrix.compiler.cppstd }}_${{ matrix.build_type }}]"
+            -DRESTINIO_EXPLICIT_CPPSTD=${{ matrix.build_settings.cppstd }} \
+            -DRESTINIO_ASIO_SOURCE=boost \
+            -DBOOST_ROOT=${{ steps.install-boost.outputs.BOOST_ROOT }} \
+            -DRESTINIO_TEST_SUFFIX=" [${RESTINIO_BUILD_TAG}]"
+
+      - name: Configure
+        if: ${{ matrix.build_settings.asio_source == 'boost-system-package' }}
+        shell: bash
+        run: |
+          cd dev
+          cmake \
+            -B ${RESTINIO_BUILD_DIR} \
+            -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
+            -DRESTINIO_EXPLICIT_CPPSTD=${{ matrix.build_settings.cppstd }} \
+            -DRESTINIO_ASIO_SOURCE=boost \
+            -DRESTINIO_TEST_SUFFIX=" [${RESTINIO_BUILD_TAG}]"
+
       - name: Build
         working-directory: ./dev
         shell: bash
         run: |
           cmake \
             --build $RESTINIO_BUILD_DIR \
+             --parallel $(nproc) \
             --verbose
       - name: Test
         shell: bash
@@ -202,6 +264,7 @@ jobs:
         run: |
           cmake \
             --build $RESTINIO_BUILD_DIR \
+            --parallel $(sysctl -n hw.ncpu) \
             --verbose
       - name: Test
         shell: bash
diff --git a/dev/CMakeLists.txt b/dev/CMakeLists.txt
index bc50c066..318c7496 100644
--- a/dev/CMakeLists.txt
+++ b/dev/CMakeLists.txt
@@ -137,7 +137,7 @@ if (RESTINIO_ASIO_SOURCE STREQUAL "standalone")
     endif ()
 else ()
     if (NOT RESTINIO_USE_SYSTEM_BOOST_ASIO)
-        find_package(Boost REQUIRED)
+        find_package(Boost REQUIRED COMPONENTS headers regex)
     endif ()
 endif ()
 
diff --git a/dev/restinio/CMakeLists.txt b/dev/restinio/CMakeLists.txt
index 683cce47..23988565 100644
--- a/dev/restinio/CMakeLists.txt
+++ b/dev/restinio/CMakeLists.txt
@@ -77,6 +77,8 @@ elseif (RESTINIO_ASIO_SOURCE STREQUAL "boost")
                 "Unable to identify how to depend on Boost::asio. "
                 "Giving up...")
     endif ()
+
+    target_compile_definitions(${RESTINIO_LIBRARY_NAME} INTERFACE RESTINIO_USE_BOOST_ASIO)
 else ()
     message(FATAL_ERROR "Invalid value for RESTINIO_ASIO_SOURCE (${RESTINIO_ASIO_SOURCE})")
 endif ()
diff --git a/dev/test/handle_requests/async_chained_handlers_2/main.cpp b/dev/test/handle_requests/async_chained_handlers_2/main.cpp
index 256a8222..d6db6b49 100644
--- a/dev/test/handle_requests/async_chained_handlers_2/main.cpp
+++ b/dev/test/handle_requests/async_chained_handlers_2/main.cpp
@@ -15,6 +15,8 @@
 
 #include "../../common/test_extra_data_factory.ipp"
 
+#include <future>
+
 using atomic_counter_t = std::atomic< unsigned int >;
 
 template< typename Extra_Data_Factory >
@@ -156,6 +158,7 @@ tc_fixed_size_chain()
 
 	std::array< so_5::mbox_t, 4u > destinations;
 
+	std::promise< void > coop_registered_promise;
 	so_5::wrapped_env_t sobjectizer{
 		[&]( so_5::environment_t & env ) {
 			env.introduce_coop(
@@ -170,8 +173,10 @@ tc_fixed_size_chain()
 					destinations[ 0u ] = coop.make_agent< dummy_stage_t >(
 							stages_completed, destinations[ 1u ] )->so_direct_mbox();
 				} );
+			coop_registered_promise.set_value();
 		}
 	};
+	coop_registered_promise.get_future().get();
 
 	http_server_t http_server{
 		restinio::own_io_context(),
@@ -255,22 +260,25 @@ tc_fixed_size_chain_accept_in_middle()
 
 	std::array< so_5::mbox_t, 4u > destinations;
 
+	std::promise< void > coop_registered_promise;
 	so_5::wrapped_env_t sobjectizer{
 		[&]( so_5::environment_t & env ) {
 			env.introduce_coop(
 				so_5::disp::active_obj::make_dispatcher( env ).binder(),
 				[&]( so_5::coop_t & coop ) {
-					destinations[ 3u ] = coop.make_agent< dummy_stage_t >(
-							stages_completed, destinations[ 0u ] )->so_direct_mbox();
-					destinations[ 2u ] = coop.make_agent< dummy_stage_t >(
-							stages_completed, destinations[ 3u ] )->so_direct_mbox();
 					destinations[ 1u ] = coop.make_agent< response_maker_t >(
 							stages_completed )->so_direct_mbox();
 					destinations[ 0u ] = coop.make_agent< dummy_stage_t >(
 							stages_completed, destinations[ 1u ] )->so_direct_mbox();
+					destinations[ 3u ] = coop.make_agent< dummy_stage_t >(
+							stages_completed, destinations[ 0u ] )->so_direct_mbox();
+					destinations[ 2u ] = coop.make_agent< dummy_stage_t >(
+							stages_completed, destinations[ 3u ] )->so_direct_mbox();
 				} );
+			coop_registered_promise.set_value();
 		}
 	};
+	coop_registered_promise.get_future().get();
 
 	http_server_t http_server{
 		restinio::own_io_context(),
@@ -354,6 +362,7 @@ tc_fixed_size_chain_response_with_pause()
 
 	std::array< so_5::mbox_t, 2u > destinations;
 
+	std::promise< void > coop_registered_promise;
 	so_5::wrapped_env_t sobjectizer{
 		[&]( so_5::environment_t & env ) {
 			env.introduce_coop(
@@ -364,8 +373,10 @@ tc_fixed_size_chain_response_with_pause()
 					destinations[ 0u ] = coop.make_agent< dummy_stage_t >(
 							stages_completed, destinations[ 1u ] )->so_direct_mbox();
 				} );
+			coop_registered_promise.set_value();
 		}
 	};
+	coop_registered_promise.get_future().get();
 
 	http_server_t http_server{
 		restinio::own_io_context(),
@@ -444,6 +455,7 @@ tc_growable_size_chain()
 
 	std::array< so_5::mbox_t, 4u > destinations;
 
+	std::promise< void > coop_registered_promise;
 	so_5::wrapped_env_t sobjectizer{
 		[&]( so_5::environment_t & env ) {
 			env.introduce_coop(
@@ -458,8 +470,10 @@ tc_growable_size_chain()
 					destinations[ 0u ] = coop.make_agent< dummy_stage_t >(
 							stages_completed, destinations[ 1u ] )->so_direct_mbox();
 				} );
+			coop_registered_promise.set_value();
 		}
 	};
+	coop_registered_promise.get_future().get();
 
 	typename request_handler_t::builder_t handler_builder;
 
@@ -552,6 +566,7 @@ tc_growable_size_chain_accept_in_middle()
 
 	std::array< so_5::mbox_t, 4u > destinations;
 
+	std::promise< void > coop_registered_promise;
 	so_5::wrapped_env_t sobjectizer{
 		[&]( so_5::environment_t & env ) {
 			env.introduce_coop(
@@ -566,8 +581,10 @@ tc_growable_size_chain_accept_in_middle()
 					destinations[ 0u ] = coop.make_agent< dummy_stage_t >(
 							stages_completed, destinations[ 1u ] )->so_direct_mbox();
 				} );
+			coop_registered_promise.set_value();
 		}
 	};
+	coop_registered_promise.get_future().get();
 
 	typename request_handler_t::builder_t handler_builder;
 
diff --git a/dev/test/router/express_boost_regex/CMakeLists.txt b/dev/test/router/express_boost_regex/CMakeLists.txt
index 540b9799..e0278c19 100644
--- a/dev/test/router/express_boost_regex/CMakeLists.txt
+++ b/dev/test/router/express_boost_regex/CMakeLists.txt
@@ -8,5 +8,4 @@ set(UNITTEST_SRCFILES
 	main.cpp )
 include(${CMAKE_SOURCE_DIR}/cmake/unittest.cmake)
 
-TARGET_INCLUDE_DIRECTORIES(${UNITTEST} PRIVATE ${Boost_INCLUDE_DIRS})
-TARGET_LINK_LIBRARIES(${UNITTEST} PRIVATE ${Boost_REGEX_LIBRARY})
+TARGET_LINK_LIBRARIES(${UNITTEST} PRIVATE Boost::regex)
diff --git a/dev/test/router/express_router_boost_regex/CMakeLists.txt b/dev/test/router/express_router_boost_regex/CMakeLists.txt
index 98744083..ca8f0cfd 100644
--- a/dev/test/router/express_router_boost_regex/CMakeLists.txt
+++ b/dev/test/router/express_router_boost_regex/CMakeLists.txt
@@ -1,5 +1,5 @@
 set(UNITTEST _unit.test.router.express_router_boost_regex)
 include(${CMAKE_SOURCE_DIR}/cmake/unittest.cmake)
 
-TARGET_INCLUDE_DIRECTORIES(${UNITTEST} PRIVATE ${Boost_INCLUDE_DIRS})
-TARGET_LINK_LIBRARIES(${UNITTEST} PRIVATE ${Boost_REGEX_LIBRARY})
+TARGET_LINK_LIBRARIES(${UNITTEST} PRIVATE Boost::regex)
+
diff --git a/dev/test/router/express_router_boost_regex_bench/CMakeLists.txt b/dev/test/router/express_router_boost_regex_bench/CMakeLists.txt
index 4704e298..292034df 100644
--- a/dev/test/router/express_router_boost_regex_bench/CMakeLists.txt
+++ b/dev/test/router/express_router_boost_regex_bench/CMakeLists.txt
@@ -1,5 +1,4 @@
 set(TEST_BENCH _test.router.express_router_boost_regex_bench)
 include(${CMAKE_SOURCE_DIR}/cmake/testbench.cmake)
 
-TARGET_INCLUDE_DIRECTORIES(${TEST_BENCH} PRIVATE ${Boost_INCLUDE_DIRS})
-TARGET_LINK_LIBRARIES(${TEST_BENCH} PRIVATE ${Boost_REGEX_LIBRARY})
+TARGET_LINK_LIBRARIES(${TEST_BENCH} PRIVATE Boost::regex)
diff --git a/externals.rb b/externals.rb
index 11166cad..8fac1b19 100644
--- a/externals.rb
+++ b/externals.rb
@@ -1,5 +1,5 @@
 MxxRu::arch_externals :so5 do |e|
-  e.url 'https://github.com/Stiffstream/sobjectizer/archive/v.5.8.1.tar.gz'
+  e.url 'https://github.com/Stiffstream/sobjectizer/archive/v.5.8.1.1.tar.gz'
 
   e.map_dir 'dev/so_5' => 'dev'
 end