diff --git a/internal/route/route.go b/internal/route/route.go
index 554adc0..d447a83 100644
--- a/internal/route/route.go
+++ b/internal/route/route.go
@@ -31,7 +31,7 @@ type RouteIOError struct {
 
 type RouteIO interface {
 	HandleInput(ctx context.Context, sourceId string, payload any) (bool, []RouteIOError)
-	HandleOutput(ctx context.Context, destinationId string, payload any) []error
+	HandleOutput(ctx context.Context, destinationId string, payload any) error
 }
 
 type Route interface {