diff --git a/adapter/outboundgroup/fallback.go b/adapter/outboundgroup/fallback.go
index ef237c64..8f5f539b 100644
--- a/adapter/outboundgroup/fallback.go
+++ b/adapter/outboundgroup/fallback.go
@@ -92,7 +92,7 @@ func (f *Fallback) findAliveProxy(touch bool) C.Proxy {
 	return al
 }
 
-func (f *Fallback) Set(name string) (err error) {
+func (f *Fallback) Set(name string) error {
 	var p C.Proxy
 	for _, proxy := range f.GetProxies(false) {
 		if proxy.Name() == name {
diff --git a/component/geodata/geodata.go b/component/geodata/geodata.go
index c23d0b52..ac0f820e 100644
--- a/component/geodata/geodata.go
+++ b/component/geodata/geodata.go
@@ -30,7 +30,7 @@ func (l *loader) LoadGeoSiteWithAttr(file string, siteWithAttr string) ([]*route
 		return nil, fmt.Errorf("empty listname in rule: %s", siteWithAttr)
 	}
 
-	domains, err := l.LoadSite(file, list)
+	domains, err := l.LoadSiteByPath(file, list)
 	if err != nil {
 		return nil, err
 	}
@@ -59,7 +59,7 @@ func (l *loader) LoadGeoSiteWithAttr(file string, siteWithAttr string) ([]*route
 }
 
 func (l *loader) LoadGeoIP(country string) ([]*router.CIDR, error) {
-	return l.LoadIP(C.GeoipName, country)
+	return l.LoadIPByPath(C.GeoipName, country)
 }
 
 var loaders map[string]func() LoaderImplementation
diff --git a/component/geodata/geodataproto.go b/component/geodata/geodataproto.go
index a63b25bc..ffefc484 100644
--- a/component/geodata/geodataproto.go
+++ b/component/geodata/geodataproto.go
@@ -5,8 +5,10 @@ import (
 )
 
 type LoaderImplementation interface {
-	LoadSite(filename, list string) ([]*router.Domain, error)
-	LoadIP(filename, country string) ([]*router.CIDR, error)
+	LoadSiteByPath(filename, list string) ([]*router.Domain, error)
+	LoadSiteByBytes(geositeBytes []byte, list string) ([]*router.Domain, error)
+	LoadIPByPath(filename, country string) ([]*router.CIDR, error)
+	LoadIPByBytes(geoipBytes []byte, country string) ([]*router.CIDR, error)
 }
 
 type Loader interface {
diff --git a/component/geodata/memconservative/memc.go b/component/geodata/memconservative/memc.go
index 2961f6eb..88d3b4e5 100644
--- a/component/geodata/memconservative/memc.go
+++ b/component/geodata/memconservative/memc.go
@@ -1,6 +1,7 @@
 package memconservative
 
 import (
+	"errors"
 	"fmt"
 	"runtime"
 
@@ -13,7 +14,7 @@ type memConservativeLoader struct {
 	geositecache GeoSiteCache
 }
 
-func (m *memConservativeLoader) LoadIP(filename, country string) ([]*router.CIDR, error) {
+func (m *memConservativeLoader) LoadIPByPath(filename, country string) ([]*router.CIDR, error) {
 	defer runtime.GC()
 	geoip, err := m.geoipcache.Unmarshal(filename, country)
 	if err != nil {
@@ -22,7 +23,11 @@ func (m *memConservativeLoader) LoadIP(filename, country string) ([]*router.CIDR
 	return geoip.Cidr, nil
 }
 
-func (m *memConservativeLoader) LoadSite(filename, list string) ([]*router.Domain, error) {
+func (m *memConservativeLoader) LoadIPByBytes(geoipBytes []byte, country string) ([]*router.CIDR, error) {
+	return nil, errors.New("memConservative do not support LoadIPByBytes")
+}
+
+func (m *memConservativeLoader) LoadSiteByPath(filename, list string) ([]*router.Domain, error) {
 	defer runtime.GC()
 	geosite, err := m.geositecache.Unmarshal(filename, list)
 	if err != nil {
@@ -31,6 +36,10 @@ func (m *memConservativeLoader) LoadSite(filename, list string) ([]*router.Domai
 	return geosite.Domain, nil
 }
 
+func (m *memConservativeLoader) LoadSiteByBytes(geositeBytes []byte, list string) ([]*router.Domain, error) {
+	return nil, errors.New("memConservative do not support LoadSiteByBytes")
+}
+
 func newMemConservativeLoader() geodata.LoaderImplementation {
 	return &memConservativeLoader{make(map[string]*router.GeoIP), make(map[string]*router.GeoSite)}
 }
diff --git a/component/geodata/standard/standard.go b/component/geodata/standard/standard.go
index 0febbc08..355cbf34 100644
--- a/component/geodata/standard/standard.go
+++ b/component/geodata/standard/standard.go
@@ -29,11 +29,7 @@ func ReadAsset(file string) ([]byte, error) {
 	return ReadFile(C.Path.GetAssetLocation(file))
 }
 
-func loadIP(filename, country string) ([]*router.CIDR, error) {
-	geoipBytes, err := ReadAsset(filename)
-	if err != nil {
-		return nil, fmt.Errorf("failed to open file: %s, base error: %s", filename, err.Error())
-	}
+func loadIP(geoipBytes []byte, country string) ([]*router.CIDR, error) {
 	var geoipList router.GeoIPList
 	if err := proto.Unmarshal(geoipBytes, &geoipList); err != nil {
 		return nil, err
@@ -45,14 +41,10 @@ func loadIP(filename, country string) ([]*router.CIDR, error) {
 		}
 	}
 
-	return nil, fmt.Errorf("country not found in %s%s%s", filename, ": ", country)
+	return nil, fmt.Errorf("country %s not found", country)
 }
 
-func loadSite(filename, list string) ([]*router.Domain, error) {
-	geositeBytes, err := ReadAsset(filename)
-	if err != nil {
-		return nil, fmt.Errorf("failed to open file: %s, base error: %s", filename, err.Error())
-	}
+func loadSite(geositeBytes []byte, list string) ([]*router.Domain, error) {
 	var geositeList router.GeoSiteList
 	if err := proto.Unmarshal(geositeBytes, &geositeList); err != nil {
 		return nil, err
@@ -64,17 +56,33 @@ func loadSite(filename, list string) ([]*router.Domain, error) {
 		}
 	}
 
-	return nil, fmt.Errorf("list not found in %s%s%s", filename, ": ", list)
+	return nil, fmt.Errorf("list %s not found", list)
 }
 
 type standardLoader struct{}
 
-func (d standardLoader) LoadSite(filename, list string) ([]*router.Domain, error) {
-	return loadSite(filename, list)
+func (d standardLoader) LoadSiteByPath(filename, list string) ([]*router.Domain, error) {
+	geositeBytes, err := ReadAsset(filename)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open file: %s, base error: %s", filename, err.Error())
+	}
+	return loadSite(geositeBytes, list)
 }
 
-func (d standardLoader) LoadIP(filename, country string) ([]*router.CIDR, error) {
-	return loadIP(filename, country)
+func (d standardLoader) LoadSiteByBytes(geositeBytes []byte, list string) ([]*router.Domain, error) {
+	return loadSite(geositeBytes, list)
+}
+
+func (d standardLoader) LoadIPByPath(filename, country string) ([]*router.CIDR, error) {
+	geoipBytes, err := ReadAsset(filename)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open file: %s, base error: %s", filename, err.Error())
+	}
+	return loadIP(geoipBytes, country)
+}
+
+func (d standardLoader) LoadIPByBytes(geoipBytes []byte, country string) ([]*router.CIDR, error) {
+	return loadIP(geoipBytes, country)
 }
 
 func init() {
diff --git a/config/updateGeo.go b/config/updateGeo.go
index a78a0320..e865f807 100644
--- a/config/updateGeo.go
+++ b/config/updateGeo.go
@@ -6,77 +6,75 @@ import (
 	_ "github.com/Dreamacro/clash/component/geodata/standard"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/oschwald/geoip2-golang"
-	"os"
+	"io/ioutil"
+	"net/http"
 	"runtime"
 )
 
 func UpdateGeoDatabases() error {
-	var (
-		tmpMMDB    = C.Path.Resolve("temp_country.mmdb")
-		tmpGepIP   = C.Path.Resolve("temp_geoip.dat")
-		tmpGeoSite = C.Path.Resolve("temp_geosite.dat")
-	)
-
-	if C.GeodataMode {
-		if err := downloadGeoIP(tmpGepIP); err != nil {
-			return fmt.Errorf("can't download GeoIP database file: %w", err)
-		}
-
-		if err := verifyGeoSite("temp_geoip.dat"); err != nil {
-			_ = os.Remove(tmpGepIP)
-			return fmt.Errorf("invalid GeoIP database file: %s", err)
-		}
-
-		if err := os.Rename(tmpGepIP, C.Path.GeoIP()); err != nil {
-			return fmt.Errorf("can't rename MMDB database file: %w", err)
-		}
-
-	} else {
-		if err := downloadMMDB(tmpMMDB); err != nil {
-			return fmt.Errorf("can't download MMDB database file: %w", err)
-		}
-
-		if err := verifyMMDB("temp_country.mmdb"); err != nil {
-			_ = os.Remove(tmpMMDB)
-			return fmt.Errorf("invalid MMDB database file: %s", err)
-		}
-
-		if err := os.Rename(tmpMMDB, C.Path.MMDB()); err != nil {
-			return fmt.Errorf("can't rename MMDB database file: %w", err)
-		}
-	}
-
-	if err := downloadGeoSite(tmpGeoSite); err != nil {
-		return fmt.Errorf("can't download GeoSite database file: %w", err)
-	}
-
-	if err := verifyGeoSite("temp_geosite.dat"); err != nil {
-		_ = os.Remove(tmpGeoSite)
-		return fmt.Errorf("invalid GeoSite database file: %s", err)
-	}
-
-	if err := os.Rename(tmpGeoSite, C.Path.GeoSite()); err != nil {
-		return fmt.Errorf("can't rename GeoSite database file: %w", err)
-	}
-	runtime.GC()
-	return nil
-}
-
-func verifyMMDB(path string) error {
-	instance, err := geoip2.Open(path)
-	if err == nil {
-		_ = instance.Close()
-	}
-	return err
-}
-
-func verifyGeoSite(path string) error {
+	defer runtime.GC()
 	geoLoader, err := geodata.GetGeoDataLoader("standard")
 	if err != nil {
 		return err
 	}
 
-	_, err = geoLoader.LoadSite(path, "cn")
+	if C.GeodataMode {
+		data, err := downloadForBytes(C.GeoIpUrl)
+		if err != nil {
+			return fmt.Errorf("can't download GeoIP database file: %w", err)
+		}
 
-	return err
+		if _, err = geoLoader.LoadIPByBytes(data, "cn"); err != nil {
+			return fmt.Errorf("invalid GeoIP database file: %s", err)
+		}
+
+		if saveFile(data, C.Path.GeoIP()) != nil {
+			return fmt.Errorf("can't save GeoIP database file: %w", err)
+		}
+
+	} else {
+		data, err := downloadForBytes(C.MmdbUrl)
+		if err != nil {
+			return fmt.Errorf("can't download MMDB database file: %w", err)
+		}
+
+		instance, err := geoip2.FromBytes(data)
+		if err != nil {
+			return fmt.Errorf("invalid MMDB database file: %s", err)
+		}
+		_ = instance.Close()
+
+		if saveFile(data, C.Path.MMDB()) != nil {
+			return fmt.Errorf("can't save MMDB database file: %w", err)
+		}
+	}
+
+	data, err := downloadForBytes(C.GeoSiteUrl)
+	if err != nil {
+		return fmt.Errorf("can't download GeoSite database file: %w", err)
+	}
+
+	if _, err = geoLoader.LoadSiteByBytes(data, "cn"); err != nil {
+		return fmt.Errorf("invalid GeoSite database file: %s", err)
+	}
+
+	if saveFile(data, C.Path.GeoSite()) != nil {
+		return fmt.Errorf("can't save GeoSite database file: %w", err)
+	}
+
+	return nil
+}
+
+func downloadForBytes(url string) ([]byte, error) {
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	return ioutil.ReadAll(resp.Body)
+}
+
+func saveFile(bytes []byte, path string) error {
+	return ioutil.WriteFile(path, bytes, 0o644)
 }