diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..fbdbe27
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,9 @@
+{
+  "name": "aaron/archive-tree",
+  "description": "Archive tree block for Drupal.",
+  "type": "drupal-module",
+  "license": "GPL-2.0-or-later",
+  "require": {
+    "drupal/core": ">=10.0.0 <12.0.0"
+  }
+}