diff --git a/config/pkg/ext/ext-xlswriter.yml b/config/pkg/ext/ext-xlswriter.yml
new file mode 100644
index 00000000..24d2fa3c
--- /dev/null
+++ b/config/pkg/ext/ext-xlswriter.yml
@@ -0,0 +1,18 @@
+ext-xlswriter:
+  type: php-extension
+  artifact:
+    source:
+      type: pecl
+      name: xlswriter
+    metadata:
+      license-files: [LICENSE]
+      license: BSD-2-Clause
+  depends:
+    - ext-zlib
+    - ext-zip
+  suggests:
+    - openssl
+  php-extension:
+    support:
+      BSD: wip
+    arg-type: custom
diff --git a/src/Package/Extension/xlswriter.php b/src/Package/Extension/xlswriter.php
new file mode 100644
index 00000000..b2f25716
--- /dev/null
+++ b/src/Package/Extension/xlswriter.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Package\Extension;
+
+use StaticPHP\Attribute\Package\CustomPhpConfigureArg;
+use StaticPHP\Attribute\Package\Extension;
+use StaticPHP\Package\PackageInstaller;
+use StaticPHP\Package\PhpExtensionPackage;
+
+#[Extension('xlswriter')]
+class xlswriter extends PhpExtensionPackage
+{
+    #[CustomPhpConfigureArg('Darwin')]
+    #[CustomPhpConfigureArg('Linux')]
+    public function getUnixConfigureArg(bool $shared, PackageInstaller $installer): string
+    {
+        $arg = '--with-xlswriter --enable-reader';
+        if ($installer->getLibraryPackage('openssl')) {
+            $arg .= ' --with-openssl=' . $installer->getLibraryPackage('openssl')->getBuildRootPath();
+        }
+        return $arg;
+    }
+}