diff --git a/common/windnsapi/dnsapi_windows.go b/common/windnsapi/dnsapi_windows.go
new file mode 100644
index 0000000..1d5bc87
--- /dev/null
+++ b/common/windnsapi/dnsapi_windows.go
@@ -0,0 +1,21 @@
+package windnsapi
+
+import (
+	"os"
+	"syscall"
+
+	"golang.org/x/sys/windows"
+)
+
+var (
+	moddnsapi                 = windows.NewLazySystemDLL("dnsapi.dll")
+	procDnsFlushResolverCache = moddnsapi.NewProc("DnsFlushResolverCache")
+)
+
+func FlushResolverCache() error {
+	r0, _, err := syscall.SyscallN(procDnsFlushResolverCache.Addr())
+	if r0 == 0 {
+		return os.NewSyscallError("DnsFlushResolverCache", err)
+	}
+	return nil
+}
diff --git a/go.mod b/go.mod
index 45d4d34..dae7b7a 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/sagernet/sing
 
 go 1.18
 
-require golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8
+require golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec
diff --git a/go.sum b/go.sum
index 25341eb..25e1312 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8 h1:h+EGohizhe9XlX18rfpa8k8RAc5XyaeamM+0VHRd4lc=
-golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec h1:BkDtF2Ih9xZ7le9ndzTA7KJow28VbQW3odyk/8drmuI=
+golang.org/x/sys v0.0.0-20220928140112-f11e5e49a4ec/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=