diff --git a/core/controllers/spider.go b/core/controllers/spider.go
index e4b9f440..163e6c53 100644
--- a/core/controllers/spider.go
+++ b/core/controllers/spider.go
@@ -2,6 +2,7 @@ package controllers
 
 import (
 	"errors"
+	"github.com/crawlab-team/crawlab/core/constants"
 	"github.com/crawlab-team/crawlab/core/models/models"
 	"math"
 	"os"
@@ -252,6 +253,13 @@ func PostSpider(c *gin.Context) {
 		return
 	}
 
+	if s.Mode == "" {
+		s.Mode = constants.RunTypeRandom
+	}
+	if s.Priority == 0 {
+		s.Priority = 5
+	}
+
 	// user
 	u := GetUserFromContext(c)
 
diff --git a/core/controllers/utils_pagination.go b/core/controllers/utils_pagination.go
index d16278af..4f148ecf 100644
--- a/core/controllers/utils_pagination.go
+++ b/core/controllers/utils_pagination.go
@@ -18,6 +18,12 @@ func GetPagination(c *gin.Context) (p *entity.Pagination, err error) {
 	if err := c.ShouldBindQuery(&_p); err != nil {
 		return GetDefaultPagination(), err
 	}
+	if _p.Page == 0 {
+		_p.Page = constants.PaginationDefaultPage
+	}
+	if _p.Size == 0 {
+		_p.Size = constants.PaginationDefaultSize
+	}
 	return &_p, nil
 }