diff --git a/.github/workflows/back-end.yml b/.github/workflows/back-end.yml
new file mode 100644
index 0000000..ce112c7
--- /dev/null
+++ b/.github/workflows/back-end.yml
@@ -0,0 +1,179 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow
+
+name: "Back-end"
+
+on:
+    pull_request: null
+    push:
+        branches:
+        - "master"
+# Add [skip ci] to commit message to skip CI.
+
+permissions:
+    contents: "read"
+
+concurrency:
+    group: "${{ github.workflow }}-${{ github.ref }}"
+    cancel-in-progress: true
+
+jobs:
+    syntax_errors:
+        name: "1️⃣ Syntax errors"
+        runs-on: "ubuntu-22.04"
+        timeout-minutes: 5
+        steps:
+        -
+            name: "Set up PHP"
+            uses: "shivammathur/setup-php@v2"
+            with:
+                php-version: "8.2"
+                extensions: "dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, gd, fileinfo, exif"
+                coverage: "none"
+                tools: "parallel-lint"
+        -
+            name: "Checkout repository"
+            uses: "actions/checkout@v4"
+        -
+            name: "Search for invalid complex curly syntax 🐌"
+            run: |
+                ! git grep -e '\${[A-Z_a-z]' -- '*.php' '*.scss'
+        -
+            name: "Check source code for syntax errors"
+            run: "composer exec --no-interaction -- parallel-lint src/ #tests/"
+
+    unit_tests:
+        name: "2️⃣ Unit and functional tests"
+        # TODO We have no unit test.
+        if: false
+        needs:
+        - "syntax_errors"
+        strategy:
+            fail-fast: false
+            matrix:
+                php-version:
+                - "8.2"
+                - "8.3"
+                dependencies:
+                - "lowest"
+                - "highest"
+        runs-on: "ubuntu-22.04"
+        timeout-minutes: 5
+        steps:
+        -
+            name: "Set up PHP"
+            uses: "shivammathur/setup-php@v2"
+            with:
+                php-version: "${{ matrix.php-version }}"
+                extensions: "dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, gd, fileinfo, exif"
+        -
+            name: "Setup problem matcher for PHPUnit"
+            run: |
+                echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+        -
+            name: "Checkout repository"
+            uses: "actions/checkout@v4"
+        -
+            name: "Install dependencies"
+            uses: "ramsey/composer-install@v2"
+            with:
+                dependency-versions: "${{ matrix.dependencies }}"
+        -
+            name: "Execute unit tests"
+            run: "composer exec -- phpunit"
+        -
+            name: "Tests have failed: upload logs"
+            if: "${{ failure() }}"
+            uses: "actions/upload-artifact@v3"
+            with:
+                path: "storage/logs/"
+                name: "laravel-logs-${{ matrix.php-version }}-${{ matrix.dependencies }}"
+        -
+            name: "Send coverage to Coveralls"
+            env:
+                COVERALLS_REPO_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+            if: "${{ env.COVERALLS_REPO_TOKEN && matrix.php-version == '8.2' && matrix.dependencies == 'locked' }}"
+            run: |
+                wget --no-verbose \
+                    "https://github.com/php-coveralls/php-coveralls/releases/download/v2.5.3/php-coveralls.phar"
+                php ./php-coveralls.phar --verbose
+
+    static_analysis:
+        name: "3️⃣ Static Analysis"
+        needs:
+        - "syntax_errors"
+        runs-on: "ubuntu-22.04"
+        timeout-minutes: 5
+        steps:
+        -
+            name: "Set up PHP"
+            uses: "shivammathur/setup-php@v2"
+            with:
+                php-version: "8.2"
+                extensions: "dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, gd, fileinfo, exif"
+                coverage: "none"
+        -
+            name: "Checkout repository"
+            uses: "actions/checkout@v4"
+        -
+            name: "Check JSON files"
+            run: |
+                git ls-files --cached -z -- '*.json' \
+                    | xargs -t --null -L 1 -- \
+                        php -r 'json_decode(file_get_contents($argv[1]), null, 512, JSON_THROW_ON_ERROR);'
+        -
+            name: "Validate Composer configuration"
+            run: "composer validate --no-interaction --strict"
+        -
+            name: "Install dependencies"
+            uses: "ramsey/composer-install@v2"
+            with:
+                dependency-versions: "locked"
+        -
+            name: "Check PSR-4 mapping 🐌"
+            run: "composer dump-autoload --dev --optimize --strict-psr"
+        -
+            # https://github.com/phpstan/phpstan/issues/9475
+            name: "Search for $this->$this typo 🐌"
+            run: |
+                ! git grep --line-number -e '\$this\s*->\s*\$this' -- ':!:*/back-end\.yml'
+        -
+            name: "Install orchestra/testbench"
+            run: "composer require --dev orchestra/testbench"
+        -
+            name: "Perform static analysis"
+            run: "composer exec -- phpstan || true 'Annotate only'"
+
+    coding_standards:
+        name: "4️⃣ Coding Standards"
+        needs:
+        - "syntax_errors"
+        runs-on: "ubuntu-22.04"
+        timeout-minutes: 5
+        steps:
+        -
+            name: "Set up PHP"
+            uses: "shivammathur/setup-php@v2"
+            with:
+                php-version: "8.2"
+                extensions: "dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, gd, fileinfo, exif"
+                coverage: "none"
+                tools: "phpcs,cs2pr"
+        -
+            name: "Checkout repository"
+            uses: "actions/checkout@v4"
+        -
+            name: "Install dependencies"
+            uses: "ramsey/composer-install@v2"
+            with:
+                dependency-versions: "locked"
+        #-
+        #    name: "Detect coding standards violations"
+        #    run: "composer exec -- phpcs -q --report=checkstyle --standard=PSR12 src/ | cs2pr"
+        -
+            name: "Detect coding standards violations"
+            id: "pint"
+            run: "composer exec -- pint --verbose --test"
+        -
+            name: "Annotate Pint results"
+            if: "${{ failure() && steps.pint.outcome == 'failure' }}"
+            run: "composer exec -- pint --test --format=checkstyle | cs2pr"
diff --git a/composer.json b/composer.json
index 873c5ad..7a379c6 100644
--- a/composer.json
+++ b/composer.json
@@ -25,16 +25,14 @@
         "laravel/laravel": "^10.16",
         "laravel/pint": "^1.6",
         "mockery/mockery": "^1.4.4",
-        "nunomaduro/larastan": "^2.1.6",
+        "larastan/larastan": "^2.9",
         "phpunit/phpunit": "^10.2.5"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,
     "autoload": {
         "psr-4": {
-            "Cone\\Bazar\\Stripe\\": "src/",
-            "Cone\\Bazar\\Stripe\\Database\\Seeders\\": "database/seeders/",
-            "Cone\\Bazar\\Stripe\\Database\\Factories\\": "database/factories/"
+            "Cone\\Bazar\\Stripe\\": "src/"
         }
     },
     "autoload-dev": {
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 0000000..3fba383
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,10 @@
+includes:
+    - vendor/larastan/larastan/extension.neon
+parameters:
+    databaseMigrationsPath:
+        - vendor/conedevelopment/bazar/database/migrations/
+        - vendor/orchestra/testbench-core/laravel/migrations/
+    paths:
+        - src/
+    level: 5
+    checkMissingIterableValueType: false