diff --git a/common/pool/buffer.go b/common/pool/buffer.go
deleted file mode 100644
index 18d14b8..0000000
--- a/common/pool/buffer.go
+++ /dev/null
@@ -1,17 +0,0 @@
-package pool
-
-import (
-	"bytes"
-	"sync"
-)
-
-var bufferPool = sync.Pool{New: func() any { return &bytes.Buffer{} }}
-
-func GetBuffer() *bytes.Buffer {
-	return bufferPool.Get().(*bytes.Buffer)
-}
-
-func PutBuffer(buf *bytes.Buffer) {
-	buf.Reset()
-	bufferPool.Put(buf)
-}
diff --git a/common/pool/alloc.go b/internal/pool/alloc.go
similarity index 96%
rename from common/pool/alloc.go
rename to internal/pool/alloc.go
index 80f320f..9a4cc10 100644
--- a/common/pool/alloc.go
+++ b/internal/pool/alloc.go
@@ -51,8 +51,7 @@ func (alloc *Allocator) Put(buf []byte) error {
 		return errors.New("allocator Put() incorrect buffer size")
 	}
 
-	//lint:ignore SA6002 ignore temporarily
-	//nolint
+	//nolint:staticcheck
 	alloc.buffers[b].Put(buf)
 	return nil
 }
diff --git a/common/pool/alloc_test.go b/internal/pool/alloc_test.go
similarity index 100%
rename from common/pool/alloc_test.go
rename to internal/pool/alloc_test.go
diff --git a/internal/pool/buffer.go b/internal/pool/buffer.go
new file mode 100644
index 0000000..9762b08
--- /dev/null
+++ b/internal/pool/buffer.go
@@ -0,0 +1,17 @@
+package pool
+
+import (
+	"bytes"
+	"sync"
+)
+
+var _bufferPool = sync.Pool{New: func() any { return &bytes.Buffer{} }}
+
+func GetBuffer() *bytes.Buffer {
+	return _bufferPool.Get().(*bytes.Buffer)
+}
+
+func PutBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	_bufferPool.Put(buf)
+}
diff --git a/common/pool/pool.go b/internal/pool/pool.go
similarity index 100%
rename from common/pool/pool.go
rename to internal/pool/pool.go
diff --git a/proxy/relay.go b/proxy/relay.go
index 2fba60a..87343e7 100644
--- a/proxy/relay.go
+++ b/proxy/relay.go
@@ -13,8 +13,8 @@ import (
 
 	"github.com/go-gost/relay"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
 	"github.com/xjasonlyu/tun2socks/v2/dialer"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 	M "github.com/xjasonlyu/tun2socks/v2/metadata"
 	"github.com/xjasonlyu/tun2socks/v2/proxy/proto"
 )
diff --git a/transport/shadowsocks/shadowaead/packet.go b/transport/shadowsocks/shadowaead/packet.go
index ecbb914..91b0bf4 100755
--- a/transport/shadowsocks/shadowaead/packet.go
+++ b/transport/shadowsocks/shadowaead/packet.go
@@ -6,7 +6,7 @@ import (
 	"io"
 	"net"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 )
 
 // ErrShortPacket means that the packet is too short for a valid encrypted packet.
diff --git a/transport/shadowsocks/shadowaead/stream.go b/transport/shadowsocks/shadowaead/stream.go
index a6b4d30..83cc641 100755
--- a/transport/shadowsocks/shadowaead/stream.go
+++ b/transport/shadowsocks/shadowaead/stream.go
@@ -7,7 +7,7 @@ import (
 	"io"
 	"net"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 )
 
 const (
diff --git a/transport/shadowsocks/shadowstream/packet.go b/transport/shadowsocks/shadowstream/packet.go
index 54b5ece..082a6d5 100755
--- a/transport/shadowsocks/shadowstream/packet.go
+++ b/transport/shadowsocks/shadowstream/packet.go
@@ -6,7 +6,7 @@ import (
 	"io"
 	"net"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 )
 
 // ErrShortPacket means the packet is too short to be a valid encrypted packet.
diff --git a/transport/simple-obfs/http.go b/transport/simple-obfs/http.go
index f9a2ed1..bdae1a3 100644
--- a/transport/simple-obfs/http.go
+++ b/transport/simple-obfs/http.go
@@ -10,7 +10,7 @@ import (
 	"net"
 	"net/http"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 )
 
 // HTTPObfs is shadowsocks http simple-obfs implementation
diff --git a/transport/simple-obfs/tls.go b/transport/simple-obfs/tls.go
index b3d5d1c..a9a3926 100644
--- a/transport/simple-obfs/tls.go
+++ b/transport/simple-obfs/tls.go
@@ -8,7 +8,7 @@ import (
 	"net"
 	"time"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 )
 
 const (
diff --git a/tunnel/tcp.go b/tunnel/tcp.go
index 45af37c..6ac563d 100644
--- a/tunnel/tcp.go
+++ b/tunnel/tcp.go
@@ -7,8 +7,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
 	"github.com/xjasonlyu/tun2socks/v2/core/adapter"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 	"github.com/xjasonlyu/tun2socks/v2/log"
 	M "github.com/xjasonlyu/tun2socks/v2/metadata"
 	"github.com/xjasonlyu/tun2socks/v2/tunnel/statistic"
diff --git a/tunnel/udp.go b/tunnel/udp.go
index 667a92b..03c5e3e 100644
--- a/tunnel/udp.go
+++ b/tunnel/udp.go
@@ -6,8 +6,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/xjasonlyu/tun2socks/v2/common/pool"
 	"github.com/xjasonlyu/tun2socks/v2/core/adapter"
+	"github.com/xjasonlyu/tun2socks/v2/internal/pool"
 	"github.com/xjasonlyu/tun2socks/v2/log"
 	M "github.com/xjasonlyu/tun2socks/v2/metadata"
 	"github.com/xjasonlyu/tun2socks/v2/tunnel/statistic"