diff --git a/code/rest/install_controller.go b/code/rest/install_controller.go
index e9b100e..427eb4a 100644
--- a/code/rest/install_controller.go
+++ b/code/rest/install_controller.go
@@ -113,6 +113,7 @@ func (this *InstallController) openDbConnection(writer http.ResponseWriter, requ
 
 	var err error = nil
 	db, err := gorm.Open("mysql", mysqlUrl)
+
 	this.PanicError(err)
 
 	db.LogMode(false)
diff --git a/code/support/tank_context.go b/code/support/tank_context.go
index a6c8f2b..28dc8d5 100644
--- a/code/support/tank_context.go
+++ b/code/support/tank_context.go
@@ -1,12 +1,14 @@
 package support
 
 import (
+	"net/http"
+	"reflect"
+	"time"
+
 	"github.com/eyebluecn/tank/code/core"
 	"github.com/eyebluecn/tank/code/rest"
 	"github.com/eyebluecn/tank/code/tool/cache"
 	"github.com/jinzhu/gorm"
-	"net/http"
-	"reflect"
 )
 
 type TankContext struct {
@@ -63,7 +65,7 @@ func (this *TankContext) Cleanup() {
 	}
 }
 
-//can serve as http server.
+// can serve as http server.
 func (this *TankContext) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
 	this.Router.ServeHTTP(writer, request)
 }
@@ -72,7 +74,9 @@ func (this *TankContext) OpenDb() {
 
 	var err error = nil
 	this.db, err = gorm.Open("mysql", core.CONFIG.MysqlUrl())
-
+	this.db.DB().SetMaxIdleConns(10)
+	this.db.DB().SetMaxOpenConns(200)
+	this.db.DB().SetConnMaxLifetime(time.Hour)
 	if err != nil {
 		core.LOGGER.Panic("failed to connect mysql database")
 	}
@@ -203,7 +207,7 @@ func (this *TankContext) initBeans() {
 	}
 }
 
-//if application installed. invoke this method.
+// if application installed. invoke this method.
 func (this *TankContext) InstallOk() {
 
 	if core.CONFIG.Installed() {
diff --git a/go.mod b/go.mod
index 5396e15..c5aefc2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,13 +1,24 @@
 module github.com/eyebluecn/tank
 
-go 1.14
+go 1.22.0
+
+toolchain go1.24.2
 
 require (
 	github.com/disintegration/imaging v1.6.2
-	github.com/go-sql-driver/mysql v1.5.0
+	github.com/go-sql-driver/mysql v1.9.3-0.20250508063858-af56fba75c83
 	github.com/jinzhu/gorm v1.9.14
 	github.com/json-iterator/go v1.1.10
 	github.com/robfig/cron/v3 v3.0.1
 	golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899
 	golang.org/x/text v0.3.3
 )
+
+require (
+	filippo.io/edwards25519 v1.1.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 // indirect
+	golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 // indirect
+	golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd // indirect
+)
diff --git a/go.sum b/go.sum
index a38a44a..7acf54d 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
 github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
 github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -9,8 +11,9 @@ github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1
 github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
 github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5 h1:Yzb9+7DPaBjB8zlTR87/ElzFsnQfuHnVUVqpZZIcV5Y=
 github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5/go.mod h1:a2zkGnVExMxdzMo3M0Hi/3sEU+cWnZpSni0O6/Yb/P0=
-github.com/go-sql-driver/mysql v1.5.0 h1:ozyZYNQW3x3HtqT1jira07DN2PArx2v7/mN66gGcHOs=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/go-sql-driver/mysql v1.9.3-0.20250508063858-af56fba75c83 h1:a4Zcy40NuJFNiYJ2Dl3EzMTNX1KCKs59acbvP6J8vbI=
+github.com/go-sql-driver/mysql v1.9.3-0.20250508063858-af56fba75c83/go.mod h1:TrDMWzjNTKvJeK2GC8uspG+PWyPLiY9QKvwdWpAdlZE=
 github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe h1:lXe2qZdvpiX5WZkZR4hgp4KJVfY3nMkvmwbVkpv1rVY=
 github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=