diff --git a/.github/workflows/commit-checker.yml b/.github/workflows/commit-checker.yml
index 05e31502..511e6f3b 100644
--- a/.github/workflows/commit-checker.yml
+++ b/.github/workflows/commit-checker.yml
@@ -10,35 +10,12 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 4
 
     - name: Get pull-request commits
-      run: |
-        # actions/checkout did a merge checkout of the pull-request. As such, the first
-        # commit is the merge commit. This means that on HEAD^ is the base branch, and
-        # on HEAD^2 are the commits from the pull-request. We now check if those trees
-        # have a common parent. If not, we fetch a few more commits till we do. In result,
-        # the log between HEAD^ and HEAD^2 will be the commits in the pull-request.
-        DEPTH=4
-        while [ -z "$(git merge-base HEAD^ HEAD^2)" ]; do
-            git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --deepen=${DEPTH} origin HEAD
-            DEPTH=$(( ${DEPTH} * 4 ))
-        done
-
-        # Just to show which commits we are going to evaluate.
-        echo "Commits in this pull-request:"
-        git log --oneline HEAD^..HEAD^2
-
-    - name: Checkout commit-checker
-      uses: actions/checkout@v3
-      with:
-        repository: OpenTTD/OpenTTD-git-hooks
-        path: git-hooks
-        ref: master
+      uses: OpenTTD/actions/checkout-pull-request@v5
 
     - name: Check commits
-      run: |
-        HOOKS_DIR=./git-hooks/hooks GIT_DIR=.git ./git-hooks/hooks/check-commits.sh HEAD^..HEAD^2
-        echo "Commit checks passed"
+      uses: OpenTTD/OpenTTD-git-hooks@main
diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index e43f23d7..34766ba0 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -25,17 +25,17 @@ jobs:
             python-version: pypy3.7
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 2
 
     - name: Checkout tags
-      uses: openttd/actions/checkout@v2
-      with:
-        with-tags: true
+      shell: bash
+      run: |
+        git fetch --depth=1 origin +refs/tags/*:refs/tags/*
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
         cache: 'pip'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4f0bf6d9..fca70965 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,17 +10,17 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
     - name: Checkout tags
-      uses: openttd/actions/checkout@v2
-      with:
-        with-tags: true
+      shell: bash
+      run: |
+        git fetch --depth=1 origin +refs/tags/*:refs/tags/*
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
         cache: 'pip'
@@ -50,17 +50,17 @@ jobs:
     runs-on: macOS-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
     - name: Checkout tags
-      uses: openttd/actions/checkout@v2
-      with:
-        with-tags: true
+      shell: bash
+      run: |
+        git fetch --depth=1 origin +refs/tags/*:refs/tags/*
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
         cache: 'pip'
@@ -90,17 +90,17 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
     - name: Checkout tags
-      uses: openttd/actions/checkout@v2
-      with:
-        with-tags: true
+      shell: bash
+      run: |
+        git fetch --depth=1 origin +refs/tags/*:refs/tags/*
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
         cache: 'pip'
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 97a52ada..2427c396 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -14,20 +14,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Set up Python 3.8
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: 3.8
     - name: Install dependencies
       run: python -m pip install -e .
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@v3
       with:
         languages: python
         queries: security-and-quality
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@v3
 
   testing:
     name: Python 3.x on ${{ matrix.os }}
@@ -38,10 +38,10 @@ jobs:
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
         cache: 'pip'
@@ -61,23 +61,18 @@ jobs:
 
   flake8:
     name: Flake8
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v3
-    - name: Flake8
-      uses: TrueBrain/actions-flake8@v2
-      with:
-        path: nml
+    uses: OpenTTD/actions/.github/workflows/rw-py-flake8.yml@v5
+    with:
+      python-path: nml
 
   black:
     name: Black
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
-    - name: Set up Python 3.6
-      uses: actions/setup-python@v4
+      uses: actions/checkout@v4
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v5
       with:
         python-version: 3.7
     - name: Black