diff --git a/package.json b/package.json
index d90ae79..f4fa366 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.16.0-rc.16",
+  "version": "0.16.0-rc.17",
   "description": "Orion Protocol SDK",
   "main": "./lib/esm/index.js",
   "module": "./lib/esm/index.js",
diff --git a/src/services/OrionAggregator/ws/index.ts b/src/services/OrionAggregator/ws/index.ts
index 3999f5c..fbbec82 100644
--- a/src/services/OrionAggregator/ws/index.ts
+++ b/src/services/OrionAggregator/ws/index.ts
@@ -89,7 +89,7 @@ type AddressUpdateInitial = {
 
 type CfdAddressUpdateUpdate = {
   kind: 'update',
-  balances: CFDBalance[],
+  balances?: CFDBalance[],
   order?: z.infer<typeof orderUpdateSchema> | z.infer<typeof fullOrderSchema>
 }