diff --git a/src/interface/account.ts b/src/interface/account.ts
deleted file mode 100644
index 06d7357..0000000
--- a/src/interface/account.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { Portfolio } from "./portfolio";
-
-export interface Account {
-    fetchPortfolio: () => Portfolio;
-}
diff --git a/src/interface/portfolio.ts b/src/interface/portfolio.ts
index 3750f1d..4f83d5a 100644
--- a/src/interface/portfolio.ts
+++ b/src/interface/portfolio.ts
@@ -29,3 +29,7 @@ export class Portfolio {
         this.positions = positions;
     }
 }
+
+export interface PortfolioProvider {
+    readonly fetchPortfolio: () => Promise<Portfolio>;
+}