diff --git a/funding.json b/funding.json
new file mode 100644
index 0000000..a4f9394
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0x89216c66f45f82595fddb810c78df46fcee9be72181e9c92b26b0ce31bd6f413"
+  }
+}