diff --git a/funding.json b/funding.json
new file mode 100644
index 000000000000..98bb57e19380
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0xdbc21abd2657c839060753eada61f93a6d835a0a2f3bdfb530339a2c85f23516"
+  }
+}