diff --git a/funding.json b/funding.json
new file mode 100644
index 0000000..fc47e7a
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0xda73a17b6b38aafcdcd684f5e10dbb5aad0b114ced4bf87c91afadf362df17f3"
+  }
+}