diff --git a/go.mod b/go.mod
index f355a977..6ca942ee 100644
--- a/go.mod
+++ b/go.mod
@@ -29,6 +29,7 @@ require (
 	github.com/miekg/dns v1.1.56
 	github.com/mroth/weightedrand/v2 v2.1.0
 	github.com/openacid/low v0.1.21
+	github.com/oschwald/geoip2-golang v1.9.0
 	github.com/oschwald/maxminddb-golang v1.12.0
 	github.com/puzpuzpuz/xsync/v2 v2.5.1
 	github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97
diff --git a/go.sum b/go.sum
index be89ca4d..ff49bc6b 100644
--- a/go.sum
+++ b/go.sum
@@ -127,6 +127,8 @@ github.com/openacid/low v0.1.21 h1:Tr2GNu4N/+rGRYdOsEHOE89cxUIaDViZbVmKz29uKGo=
 github.com/openacid/low v0.1.21/go.mod h1:q+MsKI6Pz2xsCkzV4BLj7NR5M4EX0sGz5AqotpZDVh0=
 github.com/openacid/must v0.1.3/go.mod h1:luPiXCuJlEo3UUFQngVQokV0MPGryeYvtCbQPs3U1+I=
 github.com/openacid/testkeys v0.1.6/go.mod h1:MfA7cACzBpbiwekivj8StqX0WIRmqlMsci1c37CA3Do=
+github.com/oschwald/geoip2-golang v1.9.0 h1:uvD3O6fXAXs+usU+UGExshpdP13GAqp4GBrzN7IgKZc=
+github.com/oschwald/geoip2-golang v1.9.0/go.mod h1:BHK6TvDyATVQhKNbQBdrj9eAvuwOMi2zSFXizL3K81Y=
 github.com/oschwald/maxminddb-golang v1.12.0 h1:9FnTOD0YOhP7DGxGsq4glzpGy5+w7pq50AS6wALUMYs=
 github.com/oschwald/maxminddb-golang v1.12.0/go.mod h1:q0Nob5lTCqyQ8WT6FYgS1L7PXKVVbgiymefNwIjPzgY=
 github.com/pierrec/lz4/v4 v4.1.14 h1:+fL8AQEZtz/ijeNnpduH0bROTu0O3NZAlPjQxGn8LwE=