diff --git a/doc/erd.pdf b/doc/erd.pdf
new file mode 100644
index 0000000000..4b4299cc51
Binary files /dev/null and b/doc/erd.pdf differ
diff --git a/script/erd b/script/erd
new file mode 100755
index 0000000000..ded7311b3f
--- /dev/null
+++ b/script/erd
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# * [Pre-requisites](https://voormedia.github.io/rails-erd/install.html).
+# * [Usage](https://voormedia.github.io/rails-erd/customise.html)
+
+TITLE="Openfoodnetwork domain model - generated `date +%Y-%m-%d`"
+
+rake erd title="$TITLE" filename="doc/erd"