diff --git a/README.md b/README.md
index f945500..a44068f 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,8 @@ Usage of dingo-linux-amd64:
     	debugging level (default 2)
   -gdns:auto
     	Google DNS: try to lookup the closest IPv4 server
+  -gdns:auto6
+    	Google DNS: try to lookup the closest IPv6 server
   -gdns:edns string
     	Google DNS: EDNS client subnet (set 0.0.0.0/0 to disable)
   -gdns:host string
diff --git a/gdns.go b/gdns.go
index 32d4d13..1536bf9 100644
--- a/gdns.go
+++ b/gdns.go
@@ -20,6 +20,7 @@ type Gdns struct {
 	workers *int
 	server *string
 	auto *bool
+	auto6 *bool
 	sni *string
 	host *string
 	edns *string
@@ -34,6 +35,8 @@ func (r *Gdns) Init() {
 		"Google DNS: server address")
 	r.auto   = flag.Bool("gdns:auto", false,
 		"Google DNS: try to lookup the closest IPv4 server")
+	r.auto6   = flag.Bool("gdns:auto6", false,
+		"Google DNS: try to lookup the closest IPv6 server")
 	r.sni     = flag.String("gdns:sni", "www.google.com",
 		"Google DNS: SNI string to send (should match server certificate)")
 	r.host    = flag.String("gdns:host", "dns.google.com",
@@ -56,6 +59,13 @@ func (R *Gdns) Start() {
 			R.server = &r4.Answer[0].Data
 		}
 	}
+	if *R.auto6 {
+		dbg(1, "resolving dns.google.com...")
+		r6 := R.resolve(NewHttps(*R.sni, false), *R.server, "dns.google.com", 28)
+		if r6.Status == 0 && len(r6.Answer) > 0 {
+			R.server = &r6.Answer[0].Data
+		}
+	}
 
 	dbg(1, "starting %d Google Public DNS client(s) querying server %s",
 		*R.workers, *R.server)