diff --git a/sale.schema.json b/sale.schema.json
index 0eb325d..9ba62bb 100644
--- a/sale.schema.json
+++ b/sale.schema.json
@@ -5,7 +5,7 @@
     "properties": {
       "chainId": {
         "type": "number",
-        "enum": [1, 3, 31337]
+        "enum": [1, 3, 4, 31337]
       },
       "saleId": {
         "type": "string",