diff --git a/funding.json b/funding.json
new file mode 100644
index 0000000..fd0916e
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0xaec1c406b2a124ec90aeebdde35c6c0cd9a90f0c7730b0911d2f648c8b99d062"
+  }
+}