diff --git a/events/event_stream.go b/events/event_stream.go
index 7552d2e..dede8b0 100644
--- a/events/event_stream.go
+++ b/events/event_stream.go
@@ -64,7 +64,7 @@ func NewEventStream(observerFactories []ObserverFactory) EventStream {
 		chans:     make([]chan mtglib.Event, runtime.NumCPU()),
 	}
 
-	for i := 0; i < runtime.NumCPU(); i++ {
+	for i := range runtime.NumCPU() {
 		rv.chans[i] = make(chan mtglib.Event, 1)
 
 		if len(observerFactories) == 1 {
diff --git a/internal/config/type_bool_test.go b/internal/config/type_bool_test.go
index 99d0488..8098f05 100644
--- a/internal/config/type_bool_test.go
+++ b/internal/config/type_bool_test.go
@@ -20,7 +20,7 @@ type TypeBoolTestSuite struct {
 }
 
 func (suite *TypeBoolTestSuite) TestUnmarshalFail() {
-	testData := []interface{}{
+	testData := []any{
 		"",
 		"np",
 		"нет",
@@ -29,7 +29,7 @@ func (suite *TypeBoolTestSuite) TestUnmarshalFail() {
 	}
 
 	for _, v := range testData {
-		data, err := json.Marshal(map[string]interface{}{
+		data, err := json.Marshal(map[string]any{
 			"value": v,
 		})
 		suite.NoError(err)
diff --git a/logger/init.go b/logger/init.go
index da4ff40..56906fc 100644
--- a/logger/init.go
+++ b/logger/init.go
@@ -8,5 +8,5 @@ package logger
 // commonly used by many 3pp tools. While mtglib itself does not need it, it is
 // always a good idea to support it and have a transient end to end logging.
 type StdLikeLogger interface {
-	Printf(format string, args ...interface{})
+	Printf(format string, args ...any)
 }
diff --git a/logger/noop.go b/logger/noop.go
index 5d04b79..768e48b 100644
--- a/logger/noop.go
+++ b/logger/noop.go
@@ -8,7 +8,7 @@ func (n noopLogger) Named(_ string) mtglib.Logger          { return n }
 func (n noopLogger) BindInt(_ string, _ int) mtglib.Logger { return n }
 func (n noopLogger) BindStr(_, _ string) mtglib.Logger     { return n }
 func (n noopLogger) BindJSON(_, _ string) mtglib.Logger    { return n }
-func (n noopLogger) Printf(_ string, _ ...interface{})     {}
+func (n noopLogger) Printf(_ string, _ ...any)             {}
 func (n noopLogger) Info(_ string)                         {}
 func (n noopLogger) Warning(_ string)                      {}
 func (n noopLogger) Debug(_ string)                        {}
diff --git a/logger/zerolog.go b/logger/zerolog.go
index 4f9c9b7..4cf7cd6 100644
--- a/logger/zerolog.go
+++ b/logger/zerolog.go
@@ -78,7 +78,7 @@ func (z *zeroLogContext) BindJSON(name, value string) mtglib.Logger {
 	}
 }
 
-func (z *zeroLogContext) Printf(format string, args ...interface{}) {
+func (z *zeroLogContext) Printf(format string, args ...any) {
 	z.Debug(fmt.Sprintf(format, args...))
 }
 
diff --git a/mtglib/init.go b/mtglib/init.go
index 40e3f41..81dee7a 100644
--- a/mtglib/init.go
+++ b/mtglib/init.go
@@ -249,7 +249,7 @@ type Logger interface {
 	BindJSON(name, value string) Logger
 
 	// Printf is to support log.Logger behavior.
-	Printf(format string, args ...interface{})
+	Printf(format string, args ...any)
 
 	// Info puts a message about some normal situation.
 	Info(msg string)
diff --git a/mtglib/init_internal_test.go b/mtglib/init_internal_test.go
index b182d57..50833e8 100644
--- a/mtglib/init_internal_test.go
+++ b/mtglib/init_internal_test.go
@@ -8,17 +8,17 @@ import (
 
 type NoopLogger struct{}
 
-func (n NoopLogger) Named(_ string) Logger             { return n }
-func (n NoopLogger) BindInt(_ string, _ int) Logger    { return n }
-func (n NoopLogger) BindStr(_, _ string) Logger        { return n }
-func (n NoopLogger) BindJSON(_, _ string) Logger       { return n }
-func (n NoopLogger) Printf(_ string, _ ...interface{}) {}
-func (n NoopLogger) Info(_ string)                     {}
-func (n NoopLogger) Warning(_ string)                  {}
-func (n NoopLogger) Debug(_ string)                    {}
-func (n NoopLogger) InfoError(_ string, _ error)       {}
-func (n NoopLogger) WarningError(_ string, _ error)    {}
-func (n NoopLogger) DebugError(_ string, _ error)      {}
+func (n NoopLogger) Named(_ string) Logger          { return n }
+func (n NoopLogger) BindInt(_ string, _ int) Logger { return n }
+func (n NoopLogger) BindStr(_, _ string) Logger     { return n }
+func (n NoopLogger) BindJSON(_, _ string) Logger    { return n }
+func (n NoopLogger) Printf(_ string, _ ...any)      {}
+func (n NoopLogger) Info(_ string)                  {}
+func (n NoopLogger) Warning(_ string)               {}
+func (n NoopLogger) Debug(_ string)                 {}
+func (n NoopLogger) InfoError(_ string, _ error)    {}
+func (n NoopLogger) WarningError(_ string, _ error) {}
+func (n NoopLogger) DebugError(_ string, _ error)   {}
 
 type EventStreamMock struct {
 	mock.Mock
diff --git a/mtglib/internal/faketls/client_hello.go b/mtglib/internal/faketls/client_hello.go
index d27d769..0e5e5b4 100644
--- a/mtglib/internal/faketls/client_hello.go
+++ b/mtglib/internal/faketls/client_hello.go
@@ -76,7 +76,7 @@ func ParseClientHello(secret, handshake []byte) (ClientHello, error) {
 
 	computedRandom := mac.Sum(nil)
 
-	for i := 0; i < RandomLen; i++ {
+	for i := range RandomLen {
 		computedRandom[i] ^= hello.Random[i]
 	}
 
diff --git a/mtglib/internal/faketls/pools.go b/mtglib/internal/faketls/pools.go
index 54183a0..b1f4275 100644
--- a/mtglib/internal/faketls/pools.go
+++ b/mtglib/internal/faketls/pools.go
@@ -6,7 +6,7 @@ import (
 )
 
 var bytesBufferPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		return &bytes.Buffer{}
 	},
 }
diff --git a/mtglib/internal/faketls/record/pools.go b/mtglib/internal/faketls/record/pools.go
index cc4739a..4f758b7 100644
--- a/mtglib/internal/faketls/record/pools.go
+++ b/mtglib/internal/faketls/record/pools.go
@@ -5,7 +5,7 @@ import (
 )
 
 var recordPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		return &Record{}
 	},
 }
diff --git a/mtglib/internal/obfuscated2/handshake_frame.go b/mtglib/internal/obfuscated2/handshake_frame.go
index 8fec889..0dd3c6c 100644
--- a/mtglib/internal/obfuscated2/handshake_frame.go
+++ b/mtglib/internal/obfuscated2/handshake_frame.go
@@ -63,7 +63,7 @@ func (h *handshakeFrame) connectionType() []byte {
 func (h *handshakeFrame) invert() handshakeFrame {
 	copyFrame := *h
 
-	for i := 0; i < handshakeFrameLenKey+handshakeFrameLenIV; i++ {
+	for i := range handshakeFrameLenKey + handshakeFrameLenIV {
 		copyFrame.data[handshakeFrameOffsetKey+i] = h.data[handshakeFrameOffsetConnectionType-1-i]
 	}
 
diff --git a/mtglib/internal/obfuscated2/init_test.go b/mtglib/internal/obfuscated2/init_test.go
index 50d031c..5aa85a9 100644
--- a/mtglib/internal/obfuscated2/init_test.go
+++ b/mtglib/internal/obfuscated2/init_test.go
@@ -117,7 +117,7 @@ func NewServerHandshakeTestData(t *testing.T) ServerHandshakeTestData {
 
 	serverEncryptedReverted := make([]byte, len(serverEncrypted))
 
-	for i := 0; i < 32+16; i++ {
+	for i := range 32 + 16 {
 		serverEncryptedReverted[8+i] = serverEncrypted[8+32+16-1-i]
 	}
 
diff --git a/mtglib/internal/obfuscated2/pools.go b/mtglib/internal/obfuscated2/pools.go
index f714262..5f10fd2 100644
--- a/mtglib/internal/obfuscated2/pools.go
+++ b/mtglib/internal/obfuscated2/pools.go
@@ -9,12 +9,12 @@ import (
 
 var (
 	sha256HasherPool = sync.Pool{
-		New: func() interface{} {
+		New: func() any {
 			return sha256.New()
 		},
 	}
 	bytesBufferPool = sync.Pool{
-		New: func() interface{} {
+		New: func() any {
 			return &bytes.Buffer{}
 		},
 	}
diff --git a/mtglib/internal/relay/init.go b/mtglib/internal/relay/init.go
index a0dcb0c..8bcc66c 100644
--- a/mtglib/internal/relay/init.go
+++ b/mtglib/internal/relay/init.go
@@ -5,5 +5,5 @@ const (
 )
 
 type Logger interface {
-	Printf(msg string, args ...interface{})
+	Printf(msg string, args ...any)
 }
diff --git a/mtglib/internal/relay/init_test.go b/mtglib/internal/relay/init_test.go
index e43244a..c884532 100644
--- a/mtglib/internal/relay/init_test.go
+++ b/mtglib/internal/relay/init_test.go
@@ -2,4 +2,4 @@ package relay_test
 
 type loggerMock struct{}
 
-func (l loggerMock) Printf(format string, args ...interface{}) {}
+func (l loggerMock) Printf(format string, args ...any) {}
diff --git a/mtglib/internal/relay/pools.go b/mtglib/internal/relay/pools.go
index 49ac7ac..db42933 100644
--- a/mtglib/internal/relay/pools.go
+++ b/mtglib/internal/relay/pools.go
@@ -3,7 +3,7 @@ package relay
 import "sync"
 
 var copyBufferPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		rv := make([]byte, copyBufferSize)
 
 		return &rv
diff --git a/mtglib/proxy.go b/mtglib/proxy.go
index 830a2f9..104c723 100644
--- a/mtglib/proxy.go
+++ b/mtglib/proxy.go
@@ -323,7 +323,7 @@ func NewProxy(opts ProxyOpts) (*Proxy, error) {
 	}
 
 	pool, err := ants.NewPoolWithFunc(opts.getConcurrency(),
-		func(arg interface{}) {
+		func(arg any) {
 			proxy.ServeConn(arg.(essentials.Conn)) //nolint: forcetypeassert
 		},
 		ants.WithLogger(opts.getLogger("ants")),
diff --git a/mtglib/stream_context.go b/mtglib/stream_context.go
index 3c6a739..3858282 100644
--- a/mtglib/stream_context.go
+++ b/mtglib/stream_context.go
@@ -32,7 +32,7 @@ func (s *streamContext) Err() error {
 	return s.ctx.Err() //nolint: wrapcheck
 }
 
-func (s *streamContext) Value(key interface{}) interface{} {
+func (s *streamContext) Value(key any) any {
 	return s.ctx.Value(key)
 }
 
diff --git a/network/circuit_breaker_internal_test.go b/network/circuit_breaker_internal_test.go
index 16a8443..fc7f671 100644
--- a/network/circuit_breaker_internal_test.go
+++ b/network/circuit_breaker_internal_test.go
@@ -59,7 +59,7 @@ func (suite *CircuitBreakerTestSuite) TestMultipleRunsOk() {
 		suite.ctxCancel()
 	}()
 
-	for i := 0; i < 5; i++ {
+	for range 5 {
 		go func() {
 			defer wg.Done()
 
diff --git a/network/load_balanced_socks5_test.go b/network/load_balanced_socks5_test.go
index 1d5e86c..96298ac 100644
--- a/network/load_balanced_socks5_test.go
+++ b/network/load_balanced_socks5_test.go
@@ -64,7 +64,7 @@ func (suite *LoadBalancedSocks5TestSuite) TestCannotDial() {
 	})
 	suite.NoError(err)
 
-	for i := 0; i < network.ProxyDialerOpenThreshold*2; i++ {
+	for range network.ProxyDialerOpenThreshold * 2 {
 		_, err = lbDialer.Dial("tcp", "127.1.1.1:80")
 		suite.True(errors.Is(err, network.ErrCannotDialWithAllProxies))
 	}
diff --git a/stats/pools.go b/stats/pools.go
index a8c9621..f80286a 100644
--- a/stats/pools.go
+++ b/stats/pools.go
@@ -3,7 +3,7 @@ package stats
 import "sync"
 
 var streamInfoPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		return &streamInfo{
 			tags: make(map[string]string),
 		}