diff --git a/README.md b/README.md
index 0ba659c405..1bc190c456 100644
--- a/README.md
+++ b/README.md
@@ -381,6 +381,7 @@ graph LR
 19. `ENABLE_METRIC`：是否根据请求成功率禁用渠道，默认不开启，可选值为 `true` 和 `false`。
 20. `METRIC_QUEUE_SIZE`：请求成功率统计队列大小，默认为 `10`。
 21. `METRIC_SUCCESS_RATE_THRESHOLD`：请求成功率阈值，默认为 `0.8`。
+22. `INITIAL_ROOT_TOKEN`：如果设置了该值，则在系统首次启动时会自动创建一个值为该环境变量值的 root 用户令牌。
 
 ### 命令行参数
 1. `--port <port_number>`: 指定服务器监听的端口号，默认为 `3000`。
diff --git a/common/config/config.go b/common/config/config.go
index a261523d61..3524183a53 100644
--- a/common/config/config.go
+++ b/common/config/config.go
@@ -136,3 +136,5 @@ var MetricQueueSize = env.Int("METRIC_QUEUE_SIZE", 10)
 var MetricSuccessRateThreshold = env.Float64("METRIC_SUCCESS_RATE_THRESHOLD", 0.8)
 var MetricSuccessChanSize = env.Int("METRIC_SUCCESS_CHAN_SIZE", 1024)
 var MetricFailChanSize = env.Int("METRIC_FAIL_CHAN_SIZE", 128)
+
+var InitialRootToken = os.Getenv("INITIAL_ROOT_TOKEN")
diff --git a/model/main.go b/model/main.go
index ca7a35b28c..ff542faf72 100644
--- a/model/main.go
+++ b/model/main.go
@@ -23,7 +23,7 @@ func CreateRootAccountIfNeed() error {
 	var user User
 	//if user.Status != util.UserStatusEnabled {
 	if err := DB.First(&user).Error; err != nil {
-		logger.SysLog("no user exists, create a root user for you: username is root, password is 123456")
+		logger.SysLog("no user exists, creating a root user for you: username is root, password is 123456")
 		hashedPassword, err := common.Password2Hash("123456")
 		if err != nil {
 			return err
@@ -35,9 +35,25 @@ func CreateRootAccountIfNeed() error {
 			Status:      common.UserStatusEnabled,
 			DisplayName: "Root User",
 			AccessToken: helper.GetUUID(),
-			Quota:       100000000,
+			Quota:       500000000000000,
 		}
 		DB.Create(&rootUser)
+		if config.InitialRootToken != "" {
+			logger.SysLog("creating initial root token as requested")
+			token := Token{
+				Id:             1,
+				UserId:         rootUser.Id,
+				Key:            config.InitialRootToken,
+				Status:         common.TokenStatusEnabled,
+				Name:           "Initial Root Token",
+				CreatedTime:    helper.GetTimestamp(),
+				AccessedTime:   helper.GetTimestamp(),
+				ExpiredTime:    -1,
+				RemainQuota:    500000000000000,
+				UnlimitedQuota: true,
+			}
+			DB.Create(&token)
+		}
 	}
 	return nil
 }
diff --git a/model/redemption.go b/model/redemption.go
index e0ae68e2ce..79a5b8a91a 100644
--- a/model/redemption.go
+++ b/model/redemption.go
@@ -14,7 +14,7 @@ type Redemption struct {
 	Key          string `json:"key" gorm:"type:char(32);uniqueIndex"`
 	Status       int    `json:"status" gorm:"default:1"`
 	Name         string `json:"name" gorm:"index"`
-	Quota        int64  `json:"quota" gorm:"default:100"`
+	Quota        int64  `json:"quota" gorm:"bigint;default:100"`
 	CreatedTime  int64  `json:"created_time" gorm:"bigint"`
 	RedeemedTime int64  `json:"redeemed_time" gorm:"bigint"`
 	Count        int    `json:"count" gorm:"-:all"` // only for api request
diff --git a/model/token.go b/model/token.go
index 40d0eb8f8a..98214cf92e 100644
--- a/model/token.go
+++ b/model/token.go
@@ -20,9 +20,9 @@ type Token struct {
 	CreatedTime    int64  `json:"created_time" gorm:"bigint"`
 	AccessedTime   int64  `json:"accessed_time" gorm:"bigint"`
 	ExpiredTime    int64  `json:"expired_time" gorm:"bigint;default:-1"` // -1 means never expired
-	RemainQuota    int64  `json:"remain_quota" gorm:"default:0"`
+	RemainQuota    int64  `json:"remain_quota" gorm:"bigint;default:0"`
 	UnlimitedQuota bool   `json:"unlimited_quota" gorm:"default:false"`
-	UsedQuota      int64  `json:"used_quota" gorm:"default:0"` // used quota
+	UsedQuota      int64  `json:"used_quota" gorm:"bigint;default:0"` // used quota
 }
 
 func GetAllUserTokens(userId int, startIdx int, num int) ([]*Token, error) {
diff --git a/model/user.go b/model/user.go
index e325394b97..1c5833d98c 100644
--- a/model/user.go
+++ b/model/user.go
@@ -26,9 +26,9 @@ type User struct {
 	WeChatId         string `json:"wechat_id" gorm:"column:wechat_id;index"`
 	VerificationCode string `json:"verification_code" gorm:"-:all"`                                    // this field is only for Email verification, don't save it to database!
 	AccessToken      string `json:"access_token" gorm:"type:char(32);column:access_token;uniqueIndex"` // this token is for system management
-	Quota            int64  `json:"quota" gorm:"type:int;default:0"`
-	UsedQuota        int64  `json:"used_quota" gorm:"type:int;default:0;column:used_quota"` // used quota
-	RequestCount     int    `json:"request_count" gorm:"type:int;default:0;"`               // request number
+	Quota            int64  `json:"quota" gorm:"bigint;default:0"`
+	UsedQuota        int64  `json:"used_quota" gorm:"bigint;default:0;column:used_quota"` // used quota
+	RequestCount     int    `json:"request_count" gorm:"type:int;default:0;"`             // request number
 	Group            string `json:"group" gorm:"type:varchar(32);default:'default'"`
 	AffCode          string `json:"aff_code" gorm:"type:varchar(32);column:aff_code;uniqueIndex"`
 	InviterId        int    `json:"inviter_id" gorm:"type:int;column:inviter_id;index"`