diff --git a/funding.json b/funding.json
new file mode 100644
index 0000000..3da0701
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0x84d09d5df64b7557097386f1fe9e928b56e0bdcb9fe814280dd68eb745d4129a"
+  }
+}