diff --git a/src/services/OrionAggregator/ws/index.ts b/src/services/OrionAggregator/ws/index.ts
index 44124e3..d5445e2 100644
--- a/src/services/OrionAggregator/ws/index.ts
+++ b/src/services/OrionAggregator/ws/index.ts
@@ -68,7 +68,7 @@ type SwapInfoSubscription = {
 
 type FuturesTradeInfoSubscription = {
   payload: {
-    S: string,
+    s: string,
     i: string,
     a: number,
     p?: number,