diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 1a65ac1..e3f1545 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -2,7 +2,7 @@
 
 We are using [GitHub Actions](https://github.com/features/actions) as a continuous integration system.
 
-For details, see [`workflows/continuous-integration.yml`](workflows/continuous-integration.yml).
+For details, see [`workflows`](workflows).
 
 ## Code Style
 
diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
deleted file mode 100644
index 7108a9d..0000000
--- a/.github/workflows/continuous-integration.yml
+++ /dev/null
@@ -1,210 +0,0 @@
-# https://help.github.com/en/categories/automating-your-workflow-with-github-actions
-
-on:
-  pull_request:
-  push:
-    branches:
-      - master
-
-name: "Continuous Integration"
-
-jobs:
-  composer-validate:
-    name: "Validate composer dependencies"
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "Checkout"
-        uses: actions/checkout@master
-
-      - name: "Install PHP with extensions"
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: none
-          extensions: mbstring
-          php-version: 8.1
-
-      - name: "Validate composer.json and composer.lock"
-        run: composer validate --strict
-
-  composer-normalize:
-    name: "Normalize composer.json"
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "Checkout"
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.head_ref }}
-
-      - name: "Install PHP with extensions"
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: none
-          extensions: mbstring
-          php-version: 8.1
-
-      - name: "Install locked dependencies with composer"
-        run: composer install --no-interaction --no-progress --no-suggest
-
-      - name: "Run localheinz/composer-normalize"
-        run: composer normalize
-
-      - name: "Commit fixes"
-        uses: stefanzweifel/git-auto-commit-action@v4
-        with:
-          commit_message: Normalize composer.json
-
-  php-cs-fixer:
-    name: "Fix PHP codestyle with php-cs-fixer"
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "Checkout"
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.head_ref }}
-
-      - name: "Install PHP with extensions"
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: none
-          extensions: mbstring
-          php-version: 8.1
-
-      - name: "Install dependencies with composer"
-        run: composer install --no-interaction --no-progress --no-suggest
-
-      - name: "Run php-cs-fixer"
-        run: vendor/bin/php-cs-fixer fix
-
-      - name: "Commit fixes"
-        uses: stefanzweifel/git-auto-commit-action@v4
-        with:
-          commit_message: Apply php-cs-fixer changes
-
-  static-code-analysis:
-    name: "Static Code Analysis"
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "Checkout"
-        uses: actions/checkout@master
-
-      - name: "Install PHP with extensions"
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: none
-          extensions: mbstring
-          php-version: 8.1
-
-      - name: "Install dependencies with composer"
-        run: composer install --no-interaction --no-progress --no-suggest
-
-      - name: "Run phpstan"
-        run: vendor/bin/phpstan analyse --configuration=phpstan.neon
-
-  tests:
-    name: "Tests - PHP ${{ matrix.php-version }}, Illuminate ${{ matrix.illuminate }}, ${{ matrix.dependencies }}"
-
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        php-version:
-          - "7.4"
-          - "8.0"
-          - "8.1"
-          - "8.2"
-
-        dependencies:
-          - lowest
-          - highest
-
-        illuminate:
-          - ^8.73
-          - ^9
-          - ^10
-        exclude:
-          - php-version: "7.4"
-            illuminate: ^9
-          - php-version: "7.4"
-            illuminate: ^10
-          - php-version: "8.0"
-            illuminate: ^10
-
-    steps:
-      - name: "Checkout"
-        uses: actions/checkout@master
-
-      - name: "Install PHP with extensions"
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: none
-          extensions: mbstring
-          php-version: "${{ matrix.php-version }}"
-
-      - name: "Install illuminate"
-        run: composer require "illuminate/support:${{ matrix.illuminate }}" --no-interaction --no-update
-
-      - name: "Install lowest dependencies with composer"
-        if: matrix.dependencies == 'lowest'
-        run: composer update --prefer-lowest --no-interaction --no-progress --no-suggest
-
-      - name: "Install highest dependencies with composer"
-        if: matrix.dependencies == 'highest'
-        run: composer update --no-interaction --no-progress --no-suggest
-
-      - name: "Run unit tests with phpunit/phpunit"
-        run: vendor/bin/phpunit
-
-  code-coverage:
-    name: "Code Coverage"
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "Checkout"
-        uses: actions/checkout@master
-
-      - name: "Install PHP with extensions"
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: pcov
-          extensions: mbstring
-          php-version: 8.1
-
-      - name: "Install dependencies with composer"
-        run: composer install --no-interaction --no-progress --no-suggest
-
-      - name: "Collect code coverage with Xdebug and phpunit/phpunit"
-        run: vendor/bin/phpunit --coverage-clover=.build/logs/clover.xml
-
-      - name: "Send code coverage report to codecov.io"
-        uses: codecov/codecov-action@v2
-
-  mutation-tests:
-    name: "Mutation Tests"
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "Checkout"
-        uses: actions/checkout@master
-
-      - name: "Install PHP with extensions"
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: pcov
-          extensions: mbstring
-          php-version: 8.1
-
-      - name: "Install dependencies with composer"
-        run: composer install --no-interaction --no-progress --no-suggest
-
-      - name: "Run mutation tests with infection/infection"
-        run: vendor/bin/infection --ignore-msi-with-no-mutations --min-covered-msi=60 --min-msi=60
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
new file mode 100644
index 0000000..1f12316
--- /dev/null
+++ b/.github/workflows/format.yml
@@ -0,0 +1,52 @@
+# https://help.github.com/en/categories/automating-your-workflow-with-github-actions
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  composer-normalize:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          extensions: mbstring
+          php-version: 8.3
+
+      - run: composer install --no-interaction --no-progress --no-suggest
+
+      - run: composer normalize
+
+      - uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: Normalize composer.json
+
+  php-cs-fixer:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          extensions: mbstring
+          php-version: 8.3
+
+      - run: composer install --no-interaction --no-progress --no-suggest
+
+      - run: vendor/bin/php-cs-fixer fix
+
+      - uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: Apply php-cs-fixer changes
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
new file mode 100644
index 0000000..aeb7479
--- /dev/null
+++ b/.github/workflows/validate.yml
@@ -0,0 +1,121 @@
+# https://help.github.com/en/categories/automating-your-workflow-with-github-actions
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  composer-validate:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          extensions: mbstring
+          php-version: 8.3
+
+      - run: composer validate --strict
+
+  static-code-analysis:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          extensions: mbstring
+          php-version: 8.3
+
+      - run: composer install --no-interaction --no-progress --no-suggest
+
+      - run: vendor/bin/phpstan analyse
+
+  tests:
+    name: "Tests - PHP ${{ matrix.php-version }}, Illuminate ${{ matrix.illuminate }}, ${{ matrix.dependencies }}"
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - "7.4"
+          - "8.0"
+          - "8.1"
+          - "8.2"
+          - "8.3"
+
+        dependencies:
+          - lowest
+          - highest
+
+        illuminate:
+          - ^8.73
+          - ^9
+          - ^10
+        exclude:
+          - php-version: "7.4"
+            illuminate: ^9
+          - php-version: "7.4"
+            illuminate: ^10
+          - php-version: "8.0"
+            illuminate: ^10
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          extensions: mbstring
+          php-version: "${{ matrix.php-version }}"
+
+      - run: composer require "illuminate/support:${{ matrix.illuminate }}" --no-interaction --no-update
+
+      - if: matrix.dependencies == 'lowest'
+        run: composer update --prefer-lowest --no-interaction --no-progress --no-suggest
+
+      - if: matrix.dependencies == 'highest'
+        run: composer update --no-interaction --no-progress --no-suggest
+
+      - run: vendor/bin/phpunit
+
+  code-coverage:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: pcov
+          extensions: mbstring
+          php-version: 8.3
+
+      - run: composer install --no-interaction --no-progress --no-suggest
+
+      - run: vendor/bin/phpunit --coverage-clover=.build/logs/clover.xml
+
+      - uses: codecov/codecov-action@v3
+
+  mutation-tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: pcov
+          extensions: mbstring
+          php-version: 8.3
+
+      - run: composer install --no-interaction --no-progress --no-suggest
+
+      - run: vendor/bin/infection --ignore-msi-with-no-mutations --min-covered-msi=60 --min-msi=60
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e903e4..9bef553 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@ See [GitHub releases](https://github.com/mll-lab/php-utils/releases).
 
 ## Unreleased
 
+## v1.10.0
+
+### Added
+
+- Allow custom line separator in `CSVArray::toCSV()`
+
 ## v1.9.0
 
 ### Added
diff --git a/src/CSVArray.php b/src/CSVArray.php
index da49df6..fe7fc7f 100644
--- a/src/CSVArray.php
+++ b/src/CSVArray.php
@@ -51,26 +51,23 @@ public static function toArray(string $csv, string $delimiter = ';', string $enc
     }
 
     /** @param array<int, array<string, CSVPrimitive>> $data */
-    public static function toCSV(array $data, string $delimiter = ';'): string
+    public static function toCSV(array $data, string $delimiter = ';', string $lineSeparator = "\r\n"): string
     {
         if ($data === []) {
             throw new \Exception('Array is empty');
         }
 
         // Use the keys of the array as the headers of the CSV
-        $headerLine = Arr::first($data);
-        if (! is_array($headerLine)) {
+        $headerItem = Arr::first($data);
+        if (! is_array($headerItem)) {
             throw new \Exception('Missing column headers.');
         }
+        $headerKeys = array_keys($headerItem);
 
-        $content = str_putcsv(
-            array_keys($headerLine),
-            $delimiter
-        )
-        . "\r\n";
+        $content = str_putcsv($headerKeys, $delimiter) . $lineSeparator;
 
         foreach ($data as $line) {
-            $content .= str_putcsv($line, $delimiter) . "\r\n";
+            $content .= str_putcsv($line, $delimiter) . $lineSeparator;
         }
 
         return $content;
diff --git a/tests/CSVArrayTest.php b/tests/CSVArrayTest.php
index 1a70e34..87500f9 100644
--- a/tests/CSVArrayTest.php
+++ b/tests/CSVArrayTest.php
@@ -69,6 +69,27 @@ public function testEscapesDelimiter(): void
         );
     }
 
+    public function testUnixLike(): void
+    {
+        self::assertSame(
+            <<<CSV
+            foo,bar
+            1,2
+
+            CSV,
+            CSVArray::toCSV(
+                [
+                    [
+                        'foo' => 1,
+                        'bar' => 2,
+                    ],
+                ],
+                ',',
+                "\n"
+            )
+        );
+    }
+
     public function testPrimitives(): void
     {
         self::assertSame(