diff --git a/go.mod b/go.mod
index d25828c1..bee1b450 100644
--- a/go.mod
+++ b/go.mod
@@ -29,7 +29,7 @@ require (
 	github.com/sagernet/sing-dns v0.1.5-0.20230415085626-111ecf799dfc
 	github.com/sagernet/sing-shadowsocks v0.2.2-0.20230417102954-f77257340507
 	github.com/sagernet/sing-shadowtls v0.1.2-0.20230417103049-4f682e05f19b
-	github.com/sagernet/sing-tun v0.1.4-0.20230326080954-8848c0e4cbab
+	github.com/sagernet/sing-tun v0.1.4-0.20230417112313-499c0aed67bc
 	github.com/sagernet/sing-vmess v0.1.5-0.20230417103030-8c3070ae3fb3
 	github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37
 	github.com/sagernet/tfo-go v0.0.0-20230303015439-ffcfd8c41cf9
diff --git a/go.sum b/go.sum
index a2ee56cf..10444588 100644
--- a/go.sum
+++ b/go.sum
@@ -119,8 +119,8 @@ github.com/sagernet/sing-shadowsocks v0.2.2-0.20230417102954-f77257340507 h1:bAH
 github.com/sagernet/sing-shadowsocks v0.2.2-0.20230417102954-f77257340507/go.mod h1:UJjvQGw0lyYaDGIDvUraL16fwaAEH1WFw1Y6sUcMPog=
 github.com/sagernet/sing-shadowtls v0.1.2-0.20230417103049-4f682e05f19b h1:ouW/6IDCrxkBe19YSbdCd7buHix7b+UZ6BM4Zz74XF4=
 github.com/sagernet/sing-shadowtls v0.1.2-0.20230417103049-4f682e05f19b/go.mod h1:oG8bPerYI6cZ74KquY3DvA7ynECyrILPBnce6wtBqeI=
-github.com/sagernet/sing-tun v0.1.4-0.20230326080954-8848c0e4cbab h1:a9oeWuPBuIZ70qMhIIH6RrYhp886xN9jJIwsuu4ZFUo=
-github.com/sagernet/sing-tun v0.1.4-0.20230326080954-8848c0e4cbab/go.mod h1:4YxIDEkkCjGXDOTMPw1SXpLmCQUFAWuaQN250oo+928=
+github.com/sagernet/sing-tun v0.1.4-0.20230417112313-499c0aed67bc h1:TGnS4hLAjOQjgshQcwCW5R66VkKJ8qgSCI8fPxXTs3M=
+github.com/sagernet/sing-tun v0.1.4-0.20230417112313-499c0aed67bc/go.mod h1:4YxIDEkkCjGXDOTMPw1SXpLmCQUFAWuaQN250oo+928=
 github.com/sagernet/sing-vmess v0.1.5-0.20230417103030-8c3070ae3fb3 h1:BHOnxrbC929JonuKqFdJ7ZbDp7zs4oTlH5KFvKtWu9U=
 github.com/sagernet/sing-vmess v0.1.5-0.20230417103030-8c3070ae3fb3/go.mod h1:yKrAr+dqZd64DxBXCHWrYicp+n4qbqO73mtwv3dck8U=
 github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37 h1:HuE6xSwco/Xed8ajZ+coeYLmioq0Qp1/Z2zczFaV8as=
diff --git a/route/router.go b/route/router.go
index 67d5adaf..b3618937 100644
--- a/route/router.go
+++ b/route/router.go
@@ -12,6 +12,7 @@ import (
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/dialer"
+	"github.com/sagernet/sing-box/common/dialer/conntrack"
 	"github.com/sagernet/sing-box/common/geoip"
 	"github.com/sagernet/sing-box/common/geosite"
 	"github.com/sagernet/sing-box/common/mux"
@@ -290,9 +291,9 @@ func NewRouter(
 		router.fakeIPStore = fakeip.NewStore(router, inet4Range, inet6Range)
 	}
 
-	needInterfaceMonitor := platformInterface == nil && (options.AutoDetectInterface || common.Any(inbounds, func(inbound option.Inbound) bool {
+	needInterfaceMonitor := options.AutoDetectInterface || common.Any(inbounds, func(inbound option.Inbound) bool {
 		return inbound.HTTPOptions.SetSystemProxy || inbound.MixedOptions.SetSystemProxy || inbound.TunOptions.AutoRoute
-	}))
+	})
 
 	if needInterfaceMonitor {
 		networkMonitor, err := tun.NewNetworkUpdateMonitor(router)
@@ -1001,5 +1002,9 @@ func (r *Router) notifyNetworkUpdate(int) error {
 			}
 		}
 	}
+
+	if conntrack.Enabled {
+		conntrack.Close()
+	}
 	return nil
 }