diff --git a/docs/dev.md b/docs/dev.md
index 680ac4a..d3025e8 100644
--- a/docs/dev.md
+++ b/docs/dev.md
@@ -964,7 +964,8 @@ Response:
     "global": [],
     "topTraderPosition": []
   },
-  "takerBuySellVolume": []
+  "takerBuySellVolume": [],
+  "warnings": []
 }
 ```
 
diff --git a/internal/controller/restapi/v1/market_routes.go b/internal/controller/restapi/v1/market_routes.go
index 7200afa..f2d23ee 100644
--- a/internal/controller/restapi/v1/market_routes.go
+++ b/internal/controller/restapi/v1/market_routes.go
@@ -76,10 +76,7 @@ func RegisterMarket(r fiber.Router, d MarketDeps) {
 			return fiber.NewError(fiber.StatusBadRequest, "symbol is required")
 		}
 
-		bundle, warnings, err := d.MarketQuery.GetDerivatives(c.UserContext(), symbol, period)
-		if err != nil {
-			return fiber.NewError(fiber.StatusInternalServerError, err.Error())
-		}
+		bundle, warnings := d.MarketQuery.GetDerivatives(c.UserContext(), symbol, period)
 
 		return c.JSON(fiber.Map{
 			"symbol":             symbol,
diff --git a/internal/usecase/market_query.go b/internal/usecase/market_query.go
index 171bfc5..72a27ab 100644
--- a/internal/usecase/market_query.go
+++ b/internal/usecase/market_query.go
@@ -36,7 +36,7 @@ func NewMarketQueryUsecase(
 	}
 }
 
-func (u *MarketQueryUsecase) GetDerivatives(ctx context.Context, symbol, period string) (*entity.DerivativesBundle, []string, error) {
+func (u *MarketQueryUsecase) GetDerivatives(ctx context.Context, symbol, period string) (*entity.DerivativesBundle, []string) {
 	var (
 		currentFund *entity.FundingRate
 		currentOI   *entity.OpenInterest
@@ -109,5 +109,5 @@ func (u *MarketQueryUsecase) GetDerivatives(ctx context.Context, symbol, period
 	if warnings == nil {
 		warnings = []string{}
 	}
-	return bundle, warnings, nil
+	return bundle, warnings
 }