diff --git a/internal/server/handle_api_sync.go b/internal/server/handle_api_sync.go
index 45997d4..af363c1 100644
--- a/internal/server/handle_api_sync.go
+++ b/internal/server/handle_api_sync.go
@@ -28,7 +28,7 @@ func handleSync(bs *booking.Service) echo.HandlerFunc {
 		bookingInfo := new(BookingInfo)
 		err = json.Unmarshal(body, bookingInfo)
 		if err != nil {
-			return c.String(http.StatusInternalServerError, fmt.Sprintf("error unmarshalling JSON: %w", err))
+			return c.String(http.StatusInternalServerError, fmt.Sprintf("error unmarshalling JSON: %s", err))
 		}
 
 		b, err := bs.ParseFromApi(bookingInfo.Content)