diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 98a9583ae..fb13c86c8 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -1,8 +1,11 @@
 ---
 name: CI
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - main
+      - stable/*
+  pull_request:
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
@@ -12,15 +15,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: "3.13"
+          cache: 'pip'
       - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v6
         with:
-          go-version: "1.21"
+          go-version: "1.24"
       - name: Install dependencies
         run: python -m pip install tox
       - name: Run tox
@@ -43,7 +47,7 @@ jobs:
       MYSQL_ROOT_PASSWORD: root-${{ github.run_id }}
     services:
       postgres:
-        image: postgres:latest
+        image: postgres:17
         env:
           POSTGRES_DB: ${{ env.DATABASE_NAME }}
           POSTGRES_PASSWORD: ${{ env.DATABASE_PASSWORD }}
@@ -56,7 +60,7 @@ jobs:
           --health-timeout 5s
           --health-retries 5
       mysql:
-        image: mysql:latest
+        image: mysql:8.4
         env:
           MYSQL_DATABASE: ${{ env.DATABASE_NAME }}
           MYSQL_USER: ${{ env.DATABASE_USER }}
@@ -71,9 +75,9 @@ jobs:
           --health-retries 5
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - name: Install Python dependencies
@@ -102,19 +106,22 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
+      - name: Fetch all branches
+        run: git fetch --all
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: "3.13"
+          cache: 'pip'
       - name: Install dependencies
         run: python -m pip install tox
       - name: Build docs (via tox)
         run: tox -e docs
       - name: Archive build results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v7
         with:
           name: html-docs-build
           path: docs/_build/html
@@ -129,13 +136,14 @@ jobs:
       COMPOSE_FILE: ${{ matrix.db == 'mysql' && 'docker-compose.yml' || (matrix.db == 'postgres' && 'docker-compose-pg.yml') || 'docker-compose-sqlite3.yml' }}
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: "3.13"
+          cache: 'pip'
       - name: Build docker-compose service
         run: |
           docker compose build --build-arg UID=$(id -u) --build-arg GID=$(id -g)
diff --git a/docker-compose-pg.yml b/docker-compose-pg.yml
index 44bc3ec0a..3e1798783 100644
--- a/docker-compose-pg.yml
+++ b/docker-compose-pg.yml
@@ -1,7 +1,7 @@
 ---
 services:
   db:
-    image: postgres:latest
+    image: postgres:17
     volumes:
       - ./tools/docker/db/postdata:/var/lib/postgresql/data
     environment:
diff --git a/docker-compose.yml b/docker-compose.yml
index 73f080a49..936818bf6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,7 +1,7 @@
 ---
 services:
   db:
-    image: mysql:latest
+    image: mysql:8.4
     volumes:
       - ./tools/docker/db/data:/var/lib/mysql
     environment: