diff --git a/component/mmdb/mmdb.go b/component/mmdb/mmdb.go
index d411b2b4..24edb5e5 100644
--- a/component/mmdb/mmdb.go
+++ b/component/mmdb/mmdb.go
@@ -57,7 +57,7 @@ func Verify() bool {
 func Instance() Reader {
 	once.Do(func() {
 		mmdbPath := C.Path.MMDB()
-		log.Debugln("Load MMDB file: %s", mmdbPath)
+		log.Infoln("Load MMDB file: %s", mmdbPath)
 		mmdb, err := maxminddb.Open(mmdbPath)
 		if err != nil {
 			log.Fatalln("Can't load MMDB: %s", err.Error())
@@ -94,3 +94,7 @@ func DownloadMMDB(path string) (err error) {
 
 	return err
 }
+
+func Reload() {
+	once = sync.Once{}
+}
diff --git a/config/update_geo.go b/config/update_geo.go
index 2cde47a1..bf3d0810 100644
--- a/config/update_geo.go
+++ b/config/update_geo.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/metacubex/mihomo/component/geodata"
 	_ "github.com/metacubex/mihomo/component/geodata/standard"
+	"github.com/metacubex/mihomo/component/mmdb"
 	C "github.com/metacubex/mihomo/constant"
 
 	"github.com/oschwald/maxminddb-golang"
@@ -33,6 +34,7 @@ func UpdateGeoDatabases() error {
 		}
 
 	} else {
+		defer mmdb.Reload()
 		data, err := downloadForBytes(C.MmdbUrl)
 		if err != nil {
 			return fmt.Errorf("can't download MMDB database file: %w", err)
@@ -43,6 +45,8 @@ func UpdateGeoDatabases() error {
 			return fmt.Errorf("invalid MMDB database file: %s", err)
 		}
 		_ = instance.Close()
+
+		mmdb.Instance().Reader.Close() //  mmdb is loaded with mmap, so it needs to be closed before overwriting the file
 		if err = saveFile(data, C.Path.MMDB()); err != nil {
 			return fmt.Errorf("can't save MMDB database file: %w", err)
 		}