diff --git a/conf/var.go b/conf/var.go
index a1d72440..79bd71e8 100644
--- a/conf/var.go
+++ b/conf/var.go
@@ -39,7 +39,7 @@ var (
 	ImageTypes  = []string{"jpg", "tiff", "jpeg", "png", "gif", "bmp", "svg", "ico", "swf", "webp"}
 )
 
-var settingsMap = make(map[string]string, 0)
+var settingsMap = make(map[string]string)
 
 func Set(key string, value string) {
 	settingsMap[key] = value
diff --git a/drivers/189/189.go b/drivers/189/189.go
index c1fc2cbe..68caaebb 100644
--- a/drivers/189/189.go
+++ b/drivers/189/189.go
@@ -26,7 +26,7 @@ import (
 )
 
 var client189Map map[string]*resty.Client
-var infoMap = make(map[string]Rsa, 0)
+var infoMap = make(map[string]Rsa)
 
 func (driver Cloud189) getClient(account *model.Account) (*resty.Client, error) {
 	client, ok := client189Map[account.Name]
diff --git a/drivers/189/util.go b/drivers/189/util.go
index 8f910a25..c8732cff 100644
--- a/drivers/189/util.go
+++ b/drivers/189/util.go
@@ -156,7 +156,7 @@ func getMd5(data []byte) []byte {
 
 func init() {
 	base.RegisterDriver(&Cloud189{})
-	client189Map = make(map[string]*resty.Client, 0)
+	client189Map = make(map[string]*resty.Client)
 }
 
 func decodeURIComponent(str string) string {
diff --git a/drivers/base/driver.go b/drivers/base/driver.go
index d5b7e4b4..0c5c7ad1 100644
--- a/drivers/base/driver.go
+++ b/drivers/base/driver.go
@@ -84,7 +84,7 @@ func GetDriversMap() map[string]Driver {
 }
 
 func GetDrivers() map[string][]Item {
-	res := make(map[string][]Item, 0)
+	res := make(map[string][]Item)
 	for k, v := range driversMap {
 		if v.Config().OnlyProxy {
 			res[k] = v.Items()
diff --git a/drivers/ftp/ftp.go b/drivers/ftp/ftp.go
index d0a2c4e3..f41f99a9 100644
--- a/drivers/ftp/ftp.go
+++ b/drivers/ftp/ftp.go
@@ -27,4 +27,5 @@ func (driver FTP) Login(account *model.Account) (*ftp.ServerConn, error) {
 
 func init() {
 	base.RegisterDriver(&FTP{})
+	connMap = make(map[string]*ftp.ServerConn)
 }
diff --git a/drivers/s3/s3.go b/drivers/s3/s3.go
index 05606d55..d0989d6b 100644
--- a/drivers/s3/s3.go
+++ b/drivers/s3/s3.go
@@ -118,6 +118,6 @@ func (driver S3) GetKey(path string, account *model.Account, dir bool) string {
 }
 
 func init() {
-	sessionsMap = make(map[string]*session.Session, 0)
+	sessionsMap = make(map[string]*session.Session)
 	base.RegisterDriver(&S3{})
 }