diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 1e4a764..78a759b 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -28,11 +28,62 @@ jobs:
           host: ${{ secrets.DOCKER_HOST }}
           port: ${{ secrets.DOCKER_PORT }}
           user: ${{ secrets.DOCKER_USER }}
-          #pass: ${{ secrets.DOCKER_PASS }}
           ssh_key: "${{ secrets.DOCKER_SSH_KEY }}"
           file: "docker-compose.yaml"
           name: "test-stack"
 
+  test_registry_auth:
+    name: "Test Registry Auth"
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v4
+
+      - name: "Create SSH directory"
+        run: mkdir -p ~/.ssh
+
+      - name: "Add private key to SSH agent"
+        uses: webfactory/ssh-agent@v0.5.3
+        with:
+          ssh-private-key: ${{ secrets.DOCKER_SSH_KEY }}
+
+      - name: "Do not check host key"
+        run: |
+          export ANSIBLE_HOST_KEY_CHECKING=False
+
+      - name: Run playbook
+        uses: dawidd6/action-ansible-playbook@v2
+        with:
+          playbook: actions_test.yml
+          directory: ansible
+          options: |
+            -u ${{ secrets.DOCKER_USER }}
+            --private-key ./ssh_key
+            -i ${{ secrets.DOCKER_HOST }},
+            -c ssh
+            -e "ansible_ssh_common_args='-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null'"
+
+      - name: "Write YAML"
+        id: yaml-action
+        uses: teunmooij/yaml@v1
+        with:
+          data: '{"version":"3.8","services":{"alpine":{"image":"localhost:5000/alpine","command":"tail -f /dev/null"}}}'
+          to-file: "docker-compose.yaml"
+
+      - name: "Test Local Action with Registry Auth"
+        id: test
+        uses: ./
+        with:
+          host: ${{ secrets.DOCKER_HOST }}
+          port: ${{ secrets.DOCKER_PORT }}
+          user: ${{ secrets.DOCKER_USER }}
+          ssh_key: "${{ secrets.DOCKER_SSH_KEY }}"
+          file: "docker-compose.yaml"
+          name: "test-private-stack"
+          with_registry_auth: "true"
+
   lint:
     name: "Lint"
     runs-on: ubuntu-latest
diff --git a/action.yaml b/action.yaml
index 2fe36ad..68b3322 100644
--- a/action.yaml
+++ b/action.yaml
@@ -32,6 +32,10 @@ inputs:
   env_file:
     description: "Environment File"
     required: false
+  with_registry_auth:
+    description: "Use registry authentication"
+    required: false
+    default: "false"
 
 runs:
   using: "docker"
diff --git a/ansible/actions_test.yml b/ansible/actions_test.yml
new file mode 100644
index 0000000..cc003e9
--- /dev/null
+++ b/ansible/actions_test.yml
@@ -0,0 +1,53 @@
+---
+- name: Test Registry Auth
+  hosts: all
+  become: no
+  tasks:
+    - name: Assert apache2-utils is present
+      command: dpkg -l apache2-utils
+      register: result
+      failed_when: result.rc != 0
+      changed_when: false
+
+    - name: Create registry directory
+      file:
+        path: /tmp/registry
+        state: directory
+
+    - name: Create registry user
+      shell: htpasswd -Bbn testuser testpassword > /tmp/registry/registry.password
+      changed_when: false
+
+    - name: Create Docker registry container
+      docker_container:
+        name: registry
+        image: registry:2
+        ports:
+          - "5000:5000"
+        volumes:
+          - /tmp/registry/registry.password:/auth/registry.password:ro
+        env:
+          REGISTRY_AUTH: "htpasswd"
+          REGISTRY_AUTH_HTPASSWD_REALM: "Registry Realm"
+          REGISTRY_AUTH_HTPASSWD_PATH: "/auth/registry.password"
+        state: started
+
+    - name: Login to Docker registry
+      docker_login:
+        registry: localhost:5000
+        username: testuser
+        password: testpassword
+
+    - name: pull alpine image from Docker Hub
+      docker_image:
+        name: alpine
+        tag: latest
+        source: pull
+
+    - name: Push alpine image to local registry
+      docker_image:
+        name: alpine
+        repository: localhost:5000/alpine
+        tag: latest
+        push: true
+        source: local
diff --git a/src/main.sh b/src/main.sh
index 32aa0df..42d6efe 100644
--- a/src/main.sh
+++ b/src/main.sh
@@ -60,5 +60,11 @@ if [ -n "${INPUT_ENV_FILE}" ];then
     # export ENV_FILE="${INPUT_ENV_FILE}"
 fi
 
+DEPLOY_CMD="docker stack deploy -c \"${INPUT_FILE}\" \"${INPUT_NAME}\""
+if [ "${INPUT_WITH_REGISTRY_AUTH}" == "true" ]; then
+    echo -e "\u001b[36mAdding with-registry-auth flag to command."
+    DEPLOY_CMD="$DEPLOY_CMD --with-registry-auth"
+fi
+
 echo -e "\u001b[36mDeploying Stack: \u001b[37;1m${INPUT_NAME}"
-docker stack deploy -c "${INPUT_FILE}" "${INPUT_NAME}"
+eval "${DEPLOY_CMD}"
\ No newline at end of file