diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index ff8a15c17bd..192cc372319 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -78,7 +78,7 @@ jobs:
 
       steps:
       - name: checkout
-        uses: actions/checkout@v2.3.3
+        uses: actions/checkout@v4
         with:
            submodules: recursive
 
diff --git a/.github/workflows/c.yml b/.github/workflows/c.yml
index 5c9fd684d29..c57b0fd19e8 100644
--- a/.github/workflows/c.yml
+++ b/.github/workflows/c.yml
@@ -25,10 +25,10 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-latest, windows-2019 ]
+        os: [ubuntu-20.04, macos-latest, windows-2022 ]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         submodules: true
 
@@ -53,7 +53,7 @@ jobs:
       if: runner.os == 'Windows'
       shell: cmd
       run: |
-        git clone --depth=1 --recurse-submodules -j10 --branch=boost-1.72.0 https://github.com/boostorg/boost.git
+        git clone --depth=1 --recurse-submodules -j10 --branch=boost-1.78.0 https://github.com/boostorg/boost.git
         cd boost
         bootstrap.bat
 
@@ -64,11 +64,6 @@ jobs:
         cd boost
         .\b2 headers
 
-    - name: install openssl (64 bit) (windows)
-      if: runner.os == 'Windows'
-      shell: pwsh
-      run: choco install openssl --limitoutput
-
     - name: build (windows)
       if: runner.os == 'Windows'
       shell: cmd
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index d3afa6f6efd..2172b845bcd 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -51,7 +51,7 @@ jobs:
             python-version: 3.8
           - os: macos-latest
             python-version: "3.12"
-          - os: windows-2019
+          - os: windows-2022
             python-version: 3.6
 
     steps:
@@ -115,16 +115,6 @@ jobs:
         cd boost
         .\b2 headers
 
-    - name: install openssl (windows)
-      if: runner.os == 'Windows'
-      uses: nick-fields/retry@v2
-      with:
-        shell: cmd
-        timeout_minutes: 5
-        retry_wait_seconds: 4
-        max_attempts: 3
-        command: choco install openssl --limitoutput --no-progress
-
     - name: build/test with tox (windows)
       if: runner.os == 'Windows'
       shell: cmd
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index ef13b463ae0..d2721fb9d14 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -37,14 +37,6 @@ jobs:
         with:
            submodules: true
 
-      - name: install openssl (64 bit)
-        uses: nick-fields/retry@v2
-        with:
-          timeout_minutes: 30
-          retry_wait_seconds: 4
-          max_attempts: 3
-          command: choco install openssl --limitoutput --no-progress
-
       - name: install boost
         run: |
           git clone --depth=1 --recurse-submodules -j10 --branch=boost-1.78.0 https://github.com/boostorg/boost.git
@@ -82,7 +74,7 @@ jobs:
 
    simulations:
       name: Simulations
-      runs-on: windows-2019
+      runs-on: windows-2022
 
       steps:
       - name: checkout
@@ -130,7 +122,7 @@ jobs:
 
    build:
       name: Build
-      runs-on: windows-2019
+      runs-on: windows-2022
       continue-on-error: true
 
       strategy: