diff --git a/src/services/OrionAggregator/ws/schemas/cfdBalancesSchema.ts b/src/services/OrionAggregator/ws/schemas/cfdBalancesSchema.ts
index 5ca9f22..e7abacd 100644
--- a/src/services/OrionAggregator/ws/schemas/cfdBalancesSchema.ts
+++ b/src/services/OrionAggregator/ws/schemas/cfdBalancesSchema.ts
@@ -22,7 +22,7 @@ const cfdBalanceSchema = z
     lfrd: z.string(),
     sfrs: z.string(),
     sfrd: z.string(),
-    sop: z.string().nullable(),
+    sop: z.string().optional(),
   })
   .transform((obj) => ({
     instrument: obj.i,
diff --git a/src/types.ts b/src/types.ts
index 1cd6279..95f1bb9 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -54,7 +54,7 @@ export type CFDBalance = {
   longFundingRatePerDay: string
   shortFundingRatePerSecond: string
   shortFundingRatePerDay: string
-  stopOutPrice: string | null
+  stopOutPrice?: string
 }
 
 export type Order = {