diff --git a/funding.json b/funding.json
new file mode 100644
index 000000000..cb399372c
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0xf9a4e3b240bf6d40ee533e5ed63a8288b1a739ee382b1f23ccc5229b7bc8a498"
+  }
+}