diff --git a/funding.json b/funding.json
new file mode 100644
index 00000000..e1925ca8
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0xfad78fad680d407f81e7fd46632b4b4936676d1776a5cbf02694b94698495746"
+  }
+}