diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 58b212f4..e7c7316d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           fetch-depth: 2
 
@@ -32,7 +32,7 @@ jobs:
       # Install composer dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-composer-dependencies
       - name: "Install Composer dependencies"
-        uses: "ramsey/composer-install@v2"
+        uses: "ramsey/composer-install@4.0.0"
 
       - name: Run tests
         run: composer run phpunit -- --no-coverage
@@ -98,7 +98,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           fetch-depth: 2
 
@@ -113,7 +113,7 @@ jobs:
       # Install composer dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-composer-dependencies
       - name: "Install Composer dependencies"
-        uses: "ramsey/composer-install@v2"
+        uses: "ramsey/composer-install@4.0.0"
 
       - name: Run static code analysis
         if: ${{ matrix.tool == 'phpstan' }}
@@ -125,7 +125,7 @@ jobs:
 
       - name: Upload coverage reports to Codecov
         if: ${{ matrix.tool == 'code-coverage' }}
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v7
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./.phpunit.cache/clover.xml
diff --git a/docker-compose.yml b/docker-compose.yml
index 0d0a4c87..0f434e7d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -68,7 +68,7 @@ services:
             - ./.docker/redmine-60101_data/sqlite:/usr/src/redmine/sqlite
 
     redmine-6-0:
-        image: redmine:6.0.8
+        image: redmine:6.1.3
         user: "33:33"
         ports:
             - "5060:3000"
@@ -82,7 +82,7 @@ services:
             - ./.docker/redmine-60008_data/sqlite:/usr/src/redmine/sqlite
 
     redmine-5-1:
-        image: redmine:5.1.11
+        image: redmine:6.1.3
         user: "33:33"
         ports:
             - "5051:3000"