diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..2b9f8833
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/continuous_delivery.yml b/.github/workflows/continuous_delivery.yml
index dae19f1f..292b35c7 100644
--- a/.github/workflows/continuous_delivery.yml
+++ b/.github/workflows/continuous_delivery.yml
@@ -11,13 +11,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Log in to Docker Hub Container Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
diff --git a/.github/workflows/continuous_integration.yml b/.github/workflows/continuous_integration.yml
index f2b85754..76942dd1 100644
--- a/.github/workflows/continuous_integration.yml
+++ b/.github/workflows/continuous_integration.yml
@@ -15,9 +15,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Run linters
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3
         with:
           version: v1.51.2
 
@@ -30,11 +30,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Build testing environment
         run: make build build-tests
       - name: Run tests
diff --git a/docs/openapi.yaml b/docs/openapi.yaml
index 26ba4599..564c32bb 100644
--- a/docs/openapi.yaml
+++ b/docs/openapi.yaml
@@ -79,6 +79,8 @@ paths:
           $ref: '#/components/responses/SuccessfulPDF'
         '400':
           description: Bad Request
+        '503':
+          $ref: '#/components/responses/Timeout'
 
   /forms/chromium/convert/html:
     post:
@@ -128,6 +130,8 @@ paths:
           $ref: '#/components/responses/SuccessfulPDF'
         '400':
           description: Bad Request
+        '503':
+          $ref: '#/components/responses/Timeout'
 
   /forms/chromium/convert/markdown:
     post:
@@ -181,6 +185,8 @@ paths:
           $ref: '#/components/responses/SuccessfulPDF'
         '400':
           description: Bad Request
+        '503':
+          $ref: '#/components/responses/Timeout'
 
   /forms/libreoffice/convert:
     post:
@@ -244,6 +250,8 @@ paths:
           $ref: '#/components/responses/SuccessfulPDF'
         '400':
           description: Bad Request, e.g. Both 'pdfFormat' and 'nativePdfA1aFormat' form values are provided
+        '503':
+          $ref: '#/components/responses/Timeout'
 
   /forms/pdfengines/merge:
     post:
@@ -300,6 +308,8 @@ paths:
           $ref: '#/components/responses/SuccessfulPDF'
         '400':
           description: Bad Request
+        '503':
+          $ref: '#/components/responses/Timeout'
 
   /forms/pdfengines/convert:
     post:
@@ -355,6 +365,8 @@ paths:
         '400':
           description: >-
             Bad Request, e.g. Invalid form data: no form file found for extensions: [.pdf]; form value 'pdfFormat' is required
+        '503':
+          $ref: '#/components/responses/Timeout'
 
 components:
   schemas:
@@ -727,4 +739,6 @@ components:
         application/pdf:
           schema:
             type: string
-            format: binary
\ No newline at end of file
+            format: binary
+    Timeout:
+      description: Service Unavailable