diff --git a/src/frontmatter/id.js b/src/frontmatter/id.js
new file mode 100644
index 0000000..5403fc0
--- /dev/null
+++ b/src/frontmatter/id.js
@@ -0,0 +1,4 @@
+// get ID
+module.exports = (post) => {
+	return post.data.post_id[0];
+}