diff --git a/.github/workflows/commit-checker.yml b/.github/workflows/commit-checker.yml
index 511e6f3..f3266b4 100644
--- a/.github/workflows/commit-checker.yml
+++ b/.github/workflows/commit-checker.yml
@@ -10,12 +10,12 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 4
 
     - name: Get pull-request commits
-      uses: OpenTTD/actions/checkout-pull-request@v5
+      uses: OpenTTD/actions/checkout-pull-request@v6
 
     - name: Check commits
       uses: OpenTTD/OpenTTD-git-hooks@main
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index cdb9406..be84889 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,12 +10,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: '3.8'
 
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 090d611..b17915b 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -19,10 +19,10 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.8
 
@@ -30,24 +30,24 @@ jobs:
       run: python -m pip install -e .
 
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@v4
       with:
         languages: python
         queries: security-and-quality
         source-root: .
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@v4
 
   flake8:
     name: Flake8
-    uses: OpenTTD/actions/.github/workflows/rw-py-flake8.yml@v5
+    uses: OpenTTD/actions/.github/workflows/rw-py-flake8.yml@v6
     with:
       python-path: openttd_protocol
 
   black:
     name: Black
-    uses: OpenTTD/actions/.github/workflows/rw-py-black.yml@v5
+    uses: OpenTTD/actions/.github/workflows/rw-py-black.yml@v6
     with:
       python-version: 3.8
       python-path: openttd_protocol
@@ -58,10 +58,10 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Set up Python 3.8
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.8
 
@@ -81,4 +81,4 @@ jobs:
     - pytest
     # not codeql, as that reports its own status
 
-    uses: OpenTTD/actions/.github/workflows/rw-annotation-check.yml@v5
+    uses: OpenTTD/actions/.github/workflows/rw-annotation-check.yml@v6