diff --git a/build/sysroot/etc/casaos/app-management.conf.sample b/build/sysroot/etc/casaos/app-management.conf.sample
index aeaae92d..54452f73 100644
--- a/build/sysroot/etc/casaos/app-management.conf.sample
+++ b/build/sysroot/etc/casaos/app-management.conf.sample
@@ -10,3 +10,4 @@ AppsPath = /var/lib/casaos/apps
 
 [server]
 appstore = https://casaos.app/store/main.zip
+appstore = https://github.com/bigbeartechworld/big-bear-casaos/archive/refs/heads/master.zip
\ No newline at end of file
diff --git a/cmd/migration-tool/main.go b/cmd/migration-tool/main.go
index 4d697176..4ba5a43b 100644
--- a/cmd/migration-tool/main.go
+++ b/cmd/migration-tool/main.go
@@ -70,6 +70,7 @@ func main() {
 	migrationTools := []interfaces.MigrationTool{
 		// NewMigrationDummy(),
 		NewMigration044AndOlder(),
+		NewMigration0412AndOlder(),
 	}
 
 	var selectedMigrationTool interfaces.MigrationTool
diff --git a/cmd/migration-tool/migration_0412_and_older.go b/cmd/migration-tool/migration_0412_and_older.go
new file mode 100644
index 00000000..e39e1375
--- /dev/null
+++ b/cmd/migration-tool/migration_0412_and_older.go
@@ -0,0 +1,77 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	interfaces "github.com/IceWhaleTech/CasaOS-Common"
+
+	"github.com/IceWhaleTech/CasaOS-AppManagement/pkg/config"
+)
+
+type migrationTool0412AndOlder struct{}
+
+const bigBearAppStoreUrl = "https://github.com/bigbeartechworld/big-bear-casaos/archive/refs/heads/master.zip"
+
+func (u *migrationTool0412AndOlder) IsMigrationNeeded() (bool, error) {
+	_logger.Info("Checking if migration is needed...")
+
+	// read string from AppManagementConfigFilePath
+	file, err := os.Open(config.AppManagementConfigFilePath)
+	if err != nil {
+		_logger.Error("failed to detect app management config file: %s", err)
+		return false, err
+	}
+	defer file.Close()
+	content, err := io.ReadAll(file)
+	if err != nil {
+		_logger.Error("failed to read app management config file: %s", err)
+		return false, err
+	}
+
+	if strings.Contains(string(content), bigBearAppStoreUrl) {
+		_logger.Info("Migration is add big bear app store. it is not needed.")
+		return false, nil
+	}
+	return true, nil
+}
+
+func (u *migrationTool0412AndOlder) PreMigrate() error {
+	return nil
+}
+
+func (u *migrationTool0412AndOlder) Migrate() error {
+	// add big bear app store
+	file, err := os.OpenFile(config.AppManagementConfigFilePath, os.O_RDWR, 0644)
+	if err != nil {
+		_logger.Error("failed to open app management config file: %s", err)
+		return err
+	}
+	defer file.Close()
+	content, err := io.ReadAll(file)
+	if err != nil {
+		_logger.Error("failed to read app management config file: %s", err)
+		return err
+	}
+
+	newContent := string(content)
+	newContent += fmt.Sprintf("\nappstore = %s", bigBearAppStoreUrl)
+
+	_, err = file.WriteString(newContent)
+	if err != nil {
+		_logger.Error("failed to write app management config file: %s", err)
+		return err
+	}
+
+	return nil
+}
+
+func (u *migrationTool0412AndOlder) PostMigrate() error {
+	return nil
+}
+
+func NewMigration0412AndOlder() interfaces.MigrationTool {
+	return &migrationTool0412AndOlder{}
+}
diff --git a/pkg/config/init.go b/pkg/config/init.go
index 9f6d6ff3..7d3eeb25 100644
--- a/pkg/config/init.go
+++ b/pkg/config/init.go
@@ -41,6 +41,18 @@ var (
 	GlobalEnvFilePath string
 )
 
+func ReloadConfig() {
+	var err error
+	Cfg, err = ini.LoadSources(ini.LoadOptions{Insensitive: true, AllowShadows: true}, ConfigFilePath)
+	if err != nil {
+		fmt.Println("failed to reload config", err)
+	} else {
+		mapTo("common", CommonInfo)
+		mapTo("app", AppInfo)
+		mapTo("server", ServerInfo)
+	}
+}
+
 func InitSetup(config string, sample string) {
 	ConfigFilePath = AppManagementConfigFilePath
 	if len(config) > 0 {
diff --git a/service/appstore_management.go b/service/appstore_management.go
index e3151097..494fc14f 100644
--- a/service/appstore_management.go
+++ b/service/appstore_management.go
@@ -423,6 +423,10 @@ func (a *AppStoreManagement) Catalog() (map[string]*ComposeApp, error) {
 }
 
 func (a *AppStoreManagement) UpdateCatalog() error {
+	// reload config.
+	// the appstore may be change in runtime.
+	config.ReloadConfig()
+
 	appStoreMap, err := a.AppStoreMap()
 	if err != nil {
 		return err