diff --git a/src/params.ts b/src/params.ts
index c702842..8243a46 100644
--- a/src/params.ts
+++ b/src/params.ts
@@ -123,6 +123,7 @@ export interface GetOrders {
   until?: Date;
   direction?: 'asc' | 'desc';
   nested?: boolean;
+  side?: 'buy' | 'sell';
   symbols?: string[];
 }