diff --git a/.github/scripts/run-cmake-test b/.github/scripts/run-cmake-test
deleted file mode 100755
index d5cae35e..00000000
--- a/.github/scripts/run-cmake-test
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail
-
-WORKSPACE=$(cd "$(dirname "${BASH_SOURCE[0]}")"/../.. && /bin/pwd -P)
-
-# Build with internal dependencies
-
-mkdir "${WORKSPACE}/_build_internal_deps" && cd $_
-cmake -DUSE_THIRDPARTY_LIBRARIES=ON -DENABLE_WARNINGS_AS_ERRORS=ON -DENABLE_COMPRESSION=OFF -DENABLE_PUSH=OFF "${WORKSPACE}"
-make -j$(getconf _NPROCESSORS_ONLN)
-ctest -V
-mkdir -p deploy
-make DESTDIR="${PWD}/deploy" install
-
-mkdir "${WORKSPACE}/_import_internal_deps" && cd $_
-cmake "-Dprometheus-cpp_DIR=${WORKSPACE}/_build_internal_deps/deploy/usr/local/lib/cmake/prometheus-cpp" "${WORKSPACE}/cmake/project-import"
-make -j$(getconf _NPROCESSORS_ONLN)
-
-# Build with external dependencies
-
-mkdir "${WORKSPACE}/_build" && cd $_
-cmake -DUSE_THIRDPARTY_LIBRARIES=OFF "-DCMAKE_TOOLCHAIN_FILE=${VCPKG_INSTALLATION_ROOT}/scripts/buildsystems/vcpkg.cmake" "${WORKSPACE}"
-make -j$(getconf _NPROCESSORS_ONLN)
-ctest -V -LE Benchmark
-mkdir -p deploy
-make DESTDIR="${PWD}/deploy" install
-
-mkdir "${WORKSPACE}/_import" && cd $_
-cmake "-DCMAKE_TOOLCHAIN_FILE=${VCPKG_INSTALLATION_ROOT}/scripts/buildsystems/vcpkg.cmake" "-Dprometheus-cpp_DIR=${WORKSPACE}/_build/deploy/usr/local/lib/cmake/prometheus-cpp" "${WORKSPACE}/cmake/project-import"
-make -j$(getconf _NPROCESSORS_ONLN)
diff --git a/.github/scripts/run-cmake-test.cmd b/.github/scripts/run-cmake-test.cmd
deleted file mode 100644
index 86b8a67f..00000000
--- a/.github/scripts/run-cmake-test.cmd
+++ /dev/null
@@ -1,17 +0,0 @@
-mkdir "_build_internal_deps" || EXIT /B 1
-cd "_build_internal_deps" || EXIT /B 1
-cmake .. -DUSE_THIRDPARTY_LIBRARIES=ON -DENABLE_WARNINGS_AS_ERRORS=ON -DENABLE_COMPRESSION=OFF -DENABLE_PUSH=OFF || EXIT /B 1
-cmake --build . --config Debug || EXIT /B 1
-cmake --build . --config Release || EXIT /B 1
-ctest -C Debug -V -LE Benchmark || EXIT /B 1
-ctest -C Release -V || EXIT /B 1
-cd .. || EXIT /B 1
-
-mkdir "_build" || EXIT /B 1
-cd "_build" || EXIT /B 1
-cmake .. -DUSE_THIRDPARTY_LIBRARIES=OFF -DCMAKE_TOOLCHAIN_FILE=%VCPKG_INSTALLATION_ROOT%\scripts\buildsystems\vcpkg.cmake || EXIT /B 1
-cmake --build . --config Debug || EXIT /B 1
-cmake --build . --config Release || EXIT /B 1
-ctest -C Debug -V -LE Benchmark || EXIT /B 1
-ctest -C Release -V || EXIT /B 1
-cd .. || EXIT /B 1
diff --git a/.github/scripts/run-prepare.cmd b/.github/scripts/run-prepare.cmd
deleted file mode 100644
index ec14d92f..00000000
--- a/.github/scripts/run-prepare.cmd
+++ /dev/null
@@ -1,4 +0,0 @@
-if [%1] == [cmake] (
-    %VCPKG_INSTALLATION_ROOT%/vcpkg install benchmark civetweb curl gtest zlib || EXIT /B 1
-)
-
diff --git a/.github/workflows/cmake-ci.yml b/.github/workflows/cmake-ci.yml
new file mode 100644
index 00000000..4e5fca9c
--- /dev/null
+++ b/.github/workflows/cmake-ci.yml
@@ -0,0 +1,109 @@
+name: CMake CI
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: CMake on ${{ matrix.os }} with ${{ matrix.dependencies }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macOS-latest, ubuntu-18.04, windows-2016]
+        dependencies: [submodule, vcpkg]
+    steps:
+      - name: Checkout source 
+        uses: actions/checkout@v2
+
+      - name: Checkout submodules
+        if: matrix.dependencies == 'submodule'
+        shell: bash
+        run: |
+          auth_header="$(git config --local --get http.https://github.com/.extraheader)"
+          git submodule sync --recursive
+          git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1
+
+      - name: Mount vcpkg cache
+        if: matrix.dependencies == 'vcpkg'
+        uses: actions/cache@v2
+        with:
+          path: "~/.cache/vcpkg/archives"
+          key: vcpkg-${{ runner.os }}
+
+      - name: install vcpkg dependencies
+        if: matrix.dependencies == 'vcpkg'
+        run: vcpkg install benchmark civetweb curl[core] gtest zlib
+
+      - name: Generate German locale on Ubuntu
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get remove -y --purge man-db # avoid time-consuming trigger
+          sudo apt-get update
+          sudo apt-get install -y locales
+          sudo locale-gen de_DE.UTF-8 # used by SerializerTest
+
+      - name: install ninja on Ubuntu
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get install -y ninja-build
+
+      - name: install ninja on macOS
+        if: runner.os == 'macOS'
+        run: brew install ninja
+
+      - name: "Configure for Unix with internal dependencies"
+        if: matrix.dependencies == 'submodule' && runner.os != 'Windows'
+        run: cmake -DUSE_THIRDPARTY_LIBRARIES=ON -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/_install -DENABLE_WARNINGS_AS_ERRORS=ON -DENABLE_COMPRESSION=OFF -DENABLE_PUSH=OFF -DCMAKE_DEBUG_POSTFIX=_d -DCMAKE_CONFIGURATION_TYPES='Release;Debug' -G"Ninja Multi-Config" -S ${{ github.workspace }} -B ${{ github.workspace }}/_build
+
+      - name: "Configure for Windows with internal dependencies"
+        if: matrix.dependencies == 'submodule' && runner.os == 'Windows'
+        run: cmake -DUSE_THIRDPARTY_LIBRARIES=ON -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/_install -DENABLE_WARNINGS_AS_ERRORS=ON -DENABLE_COMPRESSION=OFF -DENABLE_PUSH=OFF -DCMAKE_DEBUG_POSTFIX=_d -S ${{ github.workspace }} -B ${{ github.workspace }}/_build
+
+      - name: "Configure for Unix with vcpkg dependencies"
+        if: matrix.dependencies == 'vcpkg' && runner.os != 'Windows'
+        run: cmake -DUSE_THIRDPARTY_LIBRARIES=OFF -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/_install "-DCMAKE_TOOLCHAIN_FILE=${VCPKG_INSTALLATION_ROOT}/scripts/buildsystems/vcpkg.cmake" -DCMAKE_DEBUG_POSTFIX=_d -DCMAKE_CONFIGURATION_TYPES='Release;Debug' -G"Ninja Multi-Config" -S ${{ github.workspace }} -B ${{ github.workspace }}/_build
+
+      - name: "Configure for Windows with vcpkg dependencies"
+        if: matrix.dependencies == 'vcpkg' && runner.os == 'Windows'
+        run: cmake -DUSE_THIRDPARTY_LIBRARIES=OFF -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/_install "-DCMAKE_TOOLCHAIN_FILE=${Env:VCPKG_INSTALLATION_ROOT}\scripts\buildsystems\vcpkg.cmake" -DCMAKE_DEBUG_POSTFIX=_d -S ${{ github.workspace }} -B ${{ github.workspace }}/_build
+
+      - name: "Build Debug"
+        run: cmake --build ${{ github.workspace }}/_build --config Debug
+
+      - name: "Build Release"
+        run: cmake --build ${{ github.workspace }}/_build --config Release
+
+      - name: "Test Debug"
+        run: ctest -C Debug -V -LE Benchmark
+        working-directory: "${{ github.workspace }}/_build"
+
+      - name: "Test Release"
+        run: ctest -C Debug -V -LE Benchmark
+        working-directory: "${{ github.workspace }}/_build"
+
+      - name: "Install Debug"
+        run: cmake --install ${{ github.workspace }}/_build --config Debug
+
+      - name: "Install Release"
+        run: cmake --install ${{ github.workspace }}/_build --config Release
+
+      - name: "Configure import for Unix with internal dependencies"
+        if: matrix.dependencies == 'submodule' && runner.os != 'Windows'
+        run: cmake -Dprometheus-cpp_DIR=${{ github.workspace }}/_install/lib/cmake/prometheus-cpp -DCMAKE_CONFIGURATION_TYPES='Release;Debug' -G"Ninja Multi-Config" -S ${{ github.workspace }}/cmake/project-import -B ${{ github.workspace }}/_import
+
+      - name: "Configure import for Windows with internal dependencies"
+        if: matrix.dependencies == 'submodule' && runner.os == 'Windows'
+        run: cmake -Dprometheus-cpp_DIR=${{ github.workspace }}/_install/lib/cmake/prometheus-cpp -S ${{ github.workspace }}/cmake/project-import -B ${{ github.workspace }}/_import
+
+      - name: "Configure import for Unix with vcpkg dependencies"
+        if: matrix.dependencies == 'vcpkg' && runner.os != 'Windows'
+        run: cmake -Dprometheus-cpp_DIR=${{ github.workspace }}/_install/lib/cmake/prometheus-cpp "-DCMAKE_TOOLCHAIN_FILE=${VCPKG_INSTALLATION_ROOT}/scripts/buildsystems/vcpkg.cmake" -DCMAKE_CONFIGURATION_TYPES='Release;Debug' -G"Ninja Multi-Config" -S ${{ github.workspace }}/cmake/project-import -B ${{ github.workspace }}/_import
+
+      - name: "Configure import for Windows with vcpkg dependencies"
+        if: matrix.dependencies == 'vcpkg' && runner.os == 'Windows'
+        run: cmake -Dprometheus-cpp_DIR=${{ github.workspace }}/_install/lib/cmake/prometheus-cpp "-DCMAKE_TOOLCHAIN_FILE=${Env:VCPKG_INSTALLATION_ROOT}\scripts\buildsystems\vcpkg.cmake" -S ${{ github.workspace }}/cmake/project-import -B ${{ github.workspace }}/_import
+
+      - name: "Build import Debug"
+        run: cmake --build ${{ github.workspace }}/_import --config Debug
+
+      - name: "Build import Release"
+        run: cmake --build ${{ github.workspace }}/_import --config Release
diff --git a/.github/workflows/continuous-integration-workflow.yml b/.github/workflows/continuous-integration-workflow.yml
deleted file mode 100644
index 76a4a202..00000000
--- a/.github/workflows/continuous-integration-workflow.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-name: Continuous Integration
-on: [push, pull_request]
-
-jobs:
-  build:
-    name: ${{ matrix.buildsystem }} on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        buildsystem: [cmake]
-        os: [macOS-latest, ubuntu-16.04, windows-2016]
-    steps:
-      - uses: actions/checkout@v2
-      - name: Checkout submodules
-        shell: bash
-        run: |
-          auth_header="$(git config --local --get http.https://github.com/.extraheader)"
-          git submodule sync --recursive
-          git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1
-      - name: Prepare
-        run: .github/scripts/run-prepare ${{ matrix.buildsystem }} ${{ matrix.os }}
-      - name: Test
-        run: .github/scripts/run-${{ matrix.buildsystem }}-test ${{ matrix.os }}