diff --git a/funding.json b/funding.json
new file mode 100644
index 0000000..5c87b15
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0x220685a4514003f22cbf18a7ddd9c09f88c2383daed6cbfa3437b22a51c07c26"
+  }
+}