diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8374b2e..84f26f3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,9 +9,72 @@ on:
       - main
 
 jobs:
+  shellcheck:
+    name: Run shellcheck
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+      - name: shellcheck
+        uses: reviewdog/action-shellcheck@v1.19
+  test-postgresql:
+    name: Test pg_dump with PostgreSQL version
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      fail-fast: false
+      matrix:
+        platform: [ubuntu-latest, windows-latest, macos-latest, macos-11, windows-2022]
+        postgresql_version: [12, 14, 15]
+    services:
+      postgres:
+        image: postgres:${{ matrix.postgresql_version }}
+        env:
+          POSTGRES_USER: test_user
+          POSTGRES_PASSWORD: test_user_password
+          POSTGRES_DB: testdb
+        ports:
+          - 5432:5432
+        # needed because the postgres container does not provide a healthcheck
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 
+          persist-credentials: false  # otherwise, the token used is the GITHUB_TOKEN, instead of your personal token
+      - name: Run pg_dump 
+        uses: ./
+        with:
+          database_url: "postgres://test_user:test_user_password@localhost:5432/testdb"
+          postgresql_version: ${{ matrix.postgresql_version }}
+          path: "backups/${{ matrix.postgresql_version }}/backup.sql"
+      - name: Check changes to the backup file.
+        id: changed_backup
+        if: matrix.platform == 'ubuntu-latest'
+        uses: tj-actions/verify-changed-files@v16
+        with:
+          files: backups/${{ matrix.postgresql_version }}/backup.sql
+          
+      - name: Commit changes to backup file.
+        if: steps.changed_backup.outputs.files_changed == 'true' && matrix.platform == 'ubuntu-latest'
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git add backups/${{ matrix.postgresql_version }}/backup.sql
+          git commit -m "Auto updated backup.sql."
+      
+      - name: Push changes
+        if: steps.changed_backup.outputs.files_changed == 'true' && matrix.platform == 'ubuntu-latest'
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.PAT_TOKEN }}
+          branch: ${{ github.head_ref }}
+        
   test:
     runs-on: ubuntu-latest
-    name: Test postgres-restore
+    name: Test pg_dump
     services:
       postgres:
         image: postgres:9.6.24
diff --git a/action.yml b/action.yml
index 190ac03..95e6f6a 100644
--- a/action.yml
+++ b/action.yml
@@ -2,6 +2,9 @@ name: pg-dump
 description: Run pg_dump to generate a backup
 author: tj-actions
 inputs:
+  postgresql_version: 
+    description: 'Version of PostgreSQL. e.g 15'
+    required: false
   database_url:
     description: 'Database URL'
     required: true
@@ -17,9 +20,15 @@ runs:
   using: 'composite'
   steps:
     - run: |
-        mkdir -p $(dirname "${{ inputs.path }}")
-        pg_dump ${{ inputs.options }} -d "${{ inputs.database_url }}" > "${{ inputs.path }}"
+        bash $GITHUB_ACTION_PATH/entrypoint.sh
       shell: bash
+      env:
+        # INPUT_<VARIABLE_NAME> is not available in Composite run steps
+        # https://github.community/t/input-variable-name-is-not-available-in-composite-run-steps/127611
+        INPUT_POSTGRESQL_VERSION: ${{ inputs.postgresql_version }}
+        INPUT_PATH: ${{ inputs.path }}
+        INPUT_DATABASE_URL: ${{ inputs.database_url }}
+        INPUT_OPTIONS: ${{ inputs.options }}
 branding:
   icon: hard-drive
   color: white
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100755
index 0000000..c18968d
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+echo "::group::pg-dump"
+
+echo "Checking if the output directory exists..."
+
+if [ ! -d "$(dirname "$INPUT_PATH")" ]; then
+    echo "The output directory does not exist. Creating it..."
+    mkdir -p "$(dirname "$INPUT_PATH")"
+    echo "Created the output directory"
+else
+    echo "The output directory already exists"
+fi
+
+if [[ -n "$INPUT_POSTGRESQL_VERSION" ]]; then
+    echo "Verifying version"
+
+    # Check if the input is an integer
+    if ! [[ "$INPUT_POSTGRESQL_VERSION" =~ ^[0-9]+$ ]]; then
+        echo "Error: $INPUT_POSTGRESQL_VERSION is not a valid integer."
+        exit 1
+    fi
+
+    # Check if the input is between 10 and 15 (inclusive)
+    if (( INPUT_POSTGRESQL_VERSION < 10 || INPUT_POSTGRESQL_VERSION > 15 )); then
+        echo "Error: $INPUT_POSTGRESQL_VERSION is not between 10 and 15 (inclusive)."
+        exit 1
+    fi
+
+    echo "Validated postgresql version: $INPUT_POSTGRESQL_VERSION"
+
+    echo "Installing postgresql..."
+
+    if [[ "$(uname -s)" == "Linux" ]]; then
+        sudo apt-get update
+        sudo apt-get install -y "postgresql-$INPUT_POSTGRESQL_VERSION"
+    elif [[ "$(uname -s)" == "NT"* ]]; then
+        choco install postgresql --version="$INPUT_POSTGRESQL_VERSION" -y
+    elif [[ "$(uname -s)" == "Darwin" ]]; then
+        brew update
+        brew install "postgresql@$INPUT_POSTGRESQL_VERSION"
+    else
+        echo "Unsupported OS"
+        exit 1
+    fi
+
+    if [[ "$(uname -s)" == "NT"* ]]; then
+        echo "/Program Files/PostgreSQL/15/bin" >> "$GITHUB_PATH"
+    else
+        echo "/usr/lib/postgresql/15/bin" >> "$GITHUB_PATH"
+    fi
+
+    echo "Installed postgresql"
+fi
+
+echo "Running pg_dump..."
+
+# shellcheck disable=SC2086
+pg_dump $INPUT_OPTIONS -d "$INPUT_DATABASE_URL" > "$INPUT_PATH"
+
+echo "Complete"
+
+echo "::endgroup::"