diff --git a/funding.json b/funding.json
new file mode 100644
index 00000000..f86a1ffa
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0x72723e07fe409557489a6643b43d9493a94c10ba68230b0527f01834cb6a550f"
+  }
+}