diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5680317d..25da0b91 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
@@ -34,12 +34,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
       - name: Run ShellCheck
-        uses: ludeeus/action-shellcheck@1.1.0
+        uses: ludeeus/action-shellcheck@2.0.0
         env:
           SHELLCHECK_OPTS: -e SC1091
   luacheck:
@@ -47,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
@@ -65,7 +65,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
@@ -77,7 +77,7 @@ jobs:
       - name: Extract user manual
         run: make markdown.md
       - name: Run MarkdownLint
-        uses: nosborn/github-action-markdown-cli@v2.0.0
+        uses: nosborn/github-action-markdown-cli@v3.3.0
         with:
           files: .
           config_file: .markdownlint.yaml
@@ -88,7 +88,7 @@ jobs:
       image: python:3.10
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
@@ -108,7 +108,7 @@ jobs:
       image: python:3.10
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
@@ -146,7 +146,7 @@ jobs:
       DOCKER_TEXLIVE_TAG: ${{ matrix.texlive }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
@@ -154,7 +154,7 @@ jobs:
       - name: Build Docker image
         run: make docker-image
       - name: Login to GitHub Packages
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -183,7 +183,7 @@ jobs:
       image: ghcr.io/witiko/markdown:${{ needs.build-docker-image.outputs[matrix.texlive] }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.repo.full_name || github.repository }}
           ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.sha }}
@@ -220,11 +220,11 @@ jobs:
       DOCKER_TEXLIVE_TAG: ${{ matrix.texlive }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Login to Docker Hub
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_HUB_USER }}
           password: ${{ secrets.DOCKER_HUB_TOKEN }}
@@ -250,7 +250,7 @@ jobs:
     if: github.event_name != 'pull_request_target' && github.ref == 'refs/heads/main'
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Build distribution archives
@@ -261,31 +261,31 @@ jobs:
           make dist gh-pages
       - name: Upload artifact markdown.tds.zip
         if: matrix.texlive == 'latest'
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: markdown.tds.zip
           path: markdown.tds.zip
       - name: Upload artifact markdown.ctan.zip
         if: matrix.texlive == 'latest'
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: markdown.ctan.zip
           path: markdown.ctan.zip
       - name: Upload artifact markdown.zip
         if: matrix.texlive == 'latest'
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: markdown.zip
           path: markdown.zip
       - name: Upload artifact markdown.pdf
         if: matrix.texlive == 'latest'
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: markdown.pdf
           path: markdown.pdf
       - name: Publish user manual
         if: matrix.texlive == 'latest'
-        uses: crazy-max/ghaction-github-pages@v2
+        uses: crazy-max/ghaction-github-pages@v4
         with:
           target_branch: gh-pages
           build_dir: gh-pages
@@ -314,6 +314,6 @@ jobs:
     if: github.event_name == 'pull_request_target' && github.event.pull_request.draft == false
     steps:
       - name: Automatically merge pull request
-        uses: pascalgn/automerge-action@v0.15.6
+        uses: pascalgn/automerge-action@v0.16.3
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"