diff --git a/README.ja.md b/README.ja.md
index 243195a..ed281c4 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -70,6 +70,8 @@ opkg install kmod-nft-queue kmod-nf-conntrack-netlink
 ```yaml
 io:
   queueSize: 1024
+  rcvBuf: 4194304
+  sndBuf: 4194304
   local: true # FORWARD チェーンで OpenGFW を実行したい場合は false に設定する
 
 workers:
diff --git a/README.md b/README.md
index fa177e8..0094047 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,8 @@ opkg install kmod-nft-queue kmod-nf-conntrack-netlink
 ```yaml
 io:
   queueSize: 1024
+  rcvBuf: 4194304
+  sndBuf: 4194304
   local: true # set to false if you want to run OpenGFW on FORWARD chain
 
 workers:
diff --git a/README.zh.md b/README.zh.md
index 42b43a2..0a5bb9c 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -70,6 +70,8 @@ opkg install kmod-nft-queue kmod-nf-conntrack-netlink
 ```yaml
 io:
   queueSize: 1024
+  rcvBuf: 4194304
+  sndBuf: 4194304
   local: true # 如果需要在 FORWARD 链上运行 OpenGFW，请设置为 false
 
 workers:
diff --git a/cmd/root.go b/cmd/root.go
index a60338d..aec1650 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -168,8 +168,10 @@ type cliConfig struct {
 }
 
 type cliConfigIO struct {
-	QueueSize uint32 `mapstructure:"queueSize"`
-	Local     bool   `mapstructure:"local"`
+	QueueSize   uint32 `mapstructure:"queueSize"`
+	ReadBuffer  int    `mapstructure:"rcvBuf"`
+	WriteBuffer int    `mapstructure:"sndBuf"`
+	Local       bool   `mapstructure:"local"`
 }
 
 type cliConfigWorkers struct {
@@ -192,8 +194,10 @@ func (c *cliConfig) fillLogger(config *engine.Config) error {
 
 func (c *cliConfig) fillIO(config *engine.Config) error {
 	nfio, err := io.NewNFQueuePacketIO(io.NFQueuePacketIOConfig{
-		QueueSize: c.IO.QueueSize,
-		Local:     c.IO.Local,
+		QueueSize:   c.IO.QueueSize,
+		ReadBuffer:  c.IO.ReadBuffer,
+		WriteBuffer: c.IO.WriteBuffer,
+		Local:       c.IO.Local,
 	})
 	if err != nil {
 		return configError{Field: "io", Err: err}
diff --git a/io/nfqueue.go b/io/nfqueue.go
index d299479..2c1cff2 100644
--- a/io/nfqueue.go
+++ b/io/nfqueue.go
@@ -97,8 +97,10 @@ type nfqueuePacketIO struct {
 }
 
 type NFQueuePacketIOConfig struct {
-	QueueSize uint32
-	Local     bool
+	QueueSize   uint32
+	ReadBuffer  int
+	WriteBuffer int
+	Local       bool
 }
 
 func NewNFQueuePacketIO(config NFQueuePacketIOConfig) (PacketIO, error) {
@@ -128,6 +130,20 @@ func NewNFQueuePacketIO(config NFQueuePacketIOConfig) (PacketIO, error) {
 	if err != nil {
 		return nil, err
 	}
+	if config.ReadBuffer > 0 {
+		err = n.Con.SetReadBuffer(config.ReadBuffer)
+		if err != nil {
+			_ = n.Close()
+			return nil, err
+		}
+	}
+	if config.WriteBuffer > 0 {
+		err = n.Con.SetWriteBuffer(config.WriteBuffer)
+		if err != nil {
+			_ = n.Close()
+			return nil, err
+		}
+	}
 	return &nfqueuePacketIO{
 		n:     n,
 		local: config.Local,