diff --git a/.gitignore b/.gitignore
index bbec32a..575884b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@ missing
 mkinstalldirs
 run-tests.php
 dio-*.tgz
+sendpackagist
 
 .deps
 */*.dep
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..71ef0e0
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,13 @@
+{
+    "name": "pecl/dio",
+    "type": "php-ext",
+    "license": "PHP-3.01",
+    "description": "Direct I/O functions",
+    "require": {
+        "php": ">= 8.0.0"
+    },
+    "php-ext": {
+        "extension-name": "dio",
+        "configure-options": []
+    }
+}