diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..afc5c51
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,20 @@
+{
+    "name": "metno/mmd",
+    "type": "package",
+    "description": "MET Norway Metadata Format (MMD)",
+    "keywords": ["xslt", "xsd", "xml","rdf","skos"],
+    "homepage": "https://github.com/metno/mmd",
+    "license": "GNU General Public License v3.0",
+    "authors": [
+        {
+            "name": "See GitHub contributors",
+            "homepage": "https://github.com/metno/mmd/graphs/contributors"
+        }
+    ],
+    "require": {
+      "ext-dom": "*",
+      "ext-json": "*",
+      "ext-simplexml": "*",
+      "sweetrdf/easyrdf": "*"
+   }
+}