diff --git a/.drone.yml b/.drone.yml
index 81d9f14..d6ac213 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,7 +3,7 @@ name: default
 
 steps:
 - name: test 
-  image: golang:1.17.6
+  image: golang:1.17.8
   volumes:
   - name: deps
     path: /go/src/mod
@@ -11,7 +11,7 @@ steps:
   - go test 
 
 - name: golangci-lint
-  image: golangci/golangci-lint:v1.42
+  image: golangci/golangci-lint:v1.44
   commands:
   - golangci-lint run
 
diff --git a/.golangci.yml b/.golangci.yml
index a74f56c..dc58bb9 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -19,6 +19,12 @@ linters-settings:
       locale: US  
     exhaustive:
       default-signifies-exhaustive: true
+    varnamelen:
+      min-name-length: 2
+      ignore-names:
+        - err
+        - "n"
+        - i
     tagliatelle:
       case:
         use-field-name: true
@@ -39,3 +45,4 @@ issues:
       linters:
         - gomnd
         - exhaustivestruct
+        - ireturn
diff --git a/entry/caller.go b/entry/caller.go
index 9a292db..532c276 100644
--- a/entry/caller.go
+++ b/entry/caller.go
@@ -8,13 +8,13 @@ import (
 
 func Caller(depth int, full bool) string {
 	const offset = 4
-	_, file, line, ok := runtime.Caller(depth + offset)
+	_, file, line, has := runtime.Caller(depth + offset)
 
-	if !ok {
+	if !has {
 		file, line = "???", 0
 	}
 
-	if !full && ok {
+	if !full && has {
 		file = filepath.Base(file)
 	}
 
diff --git a/entry/entry.go b/entry/entry.go
index 40bc14b..32cbf93 100644
--- a/entry/entry.go
+++ b/entry/entry.go
@@ -38,17 +38,17 @@ func WithLevel(lvl level.Level) Option {
 }
 
 func New(opts ...Option) *Entry {
-	e := &Entry{
+	entry := &Entry{
 		fields: make(field.Fields, 0, defaultCap+1),
 		level:  level.Debug,
 		msg:    "",
 	}
 
 	for _, opt := range opts {
-		opt(e)
+		opt(entry)
 	}
 
-	return e
+	return entry
 }
 
 // Entry slice field.
diff --git a/field/fields.go b/field/fields.go
index 7f283de..f919dd6 100644
--- a/field/fields.go
+++ b/field/fields.go
@@ -19,11 +19,11 @@ func (f Fields) Len() int {
 }
 
 func (f Fields) AsMap() MapField {
-	m := make(MapField, len(f))
+	fields := make(MapField, len(f))
 
 	for _, field := range f {
-		m[field.Key()] = field.Value()
+		fields[field.Key()] = field.Value()
 	}
 
-	return m
+	return fields
 }
diff --git a/field/fields_test.go b/field/fields_test.go
index 6e7a00f..181fd69 100644
--- a/field/fields_test.go
+++ b/field/fields_test.go
@@ -8,6 +8,8 @@ import (
 )
 
 func TestFields_Append(t *testing.T) {
+	t.Parallel()
+
 	fields := field.Fields{field.Any("any", "value")}
 	fields = fields.Append(field.String("string", "value"))
 
diff --git a/field/key.go b/field/key.go
index 731c4d3..6ddb843 100644
--- a/field/key.go
+++ b/field/key.go
@@ -8,113 +8,113 @@ type Key string
 
 //nolint: gocyclo,funlen,cyclop
 func (k Key) Any(value interface{}) Field {
-	switch v := value.(type) {
+	switch val := value.(type) {
 	case string:
-		return k.String(v)
+		return k.String(val)
 	case *string:
-		return k.Stringp(v)
+		return k.Stringp(val)
 	case []string:
-		return k.Strings(v...)
+		return k.Strings(val...)
 	case bool:
-		return k.Bool(v)
+		return k.Bool(val)
 	case *bool:
-		return k.Boolp(v)
+		return k.Boolp(val)
 	case []bool:
-		return k.Bools(v...)
+		return k.Bools(val...)
 	case int8:
-		return k.Int8(v)
+		return k.Int8(val)
 	case []int8:
-		return k.Int8s(v...)
+		return k.Int8s(val...)
 	case *int8:
-		return k.Int8p(v)
+		return k.Int8p(val)
 	case int16:
-		return k.Int16(v)
+		return k.Int16(val)
 	case []int16:
-		return k.Int16s(v...)
+		return k.Int16s(val...)
 	case *int16:
-		return k.Int16p(v)
+		return k.Int16p(val)
 	case int32:
-		return k.Int32(v)
+		return k.Int32(val)
 	case []int32:
-		return k.Int32s(v...)
+		return k.Int32s(val...)
 	case *int32:
-		return k.Int32p(v)
+		return k.Int32p(val)
 	case int64:
-		return k.Int64(v)
+		return k.Int64(val)
 	case []int64:
-		return k.Int64s(v...)
+		return k.Int64s(val...)
 	case *int64:
-		return k.Int64p(v)
+		return k.Int64p(val)
 	case uint:
-		return k.Uint(v)
+		return k.Uint(val)
 	case []uint:
-		return k.Uints(v...)
+		return k.Uints(val...)
 	case *uint:
-		return k.Uintp(v)
+		return k.Uintp(val)
 	case uint8:
-		return k.Uint8(v)
+		return k.Uint8(val)
 	case *uint8:
-		return k.Uint8p(v)
+		return k.Uint8p(val)
 	case uint16:
-		return k.Uint16(v)
+		return k.Uint16(val)
 	case []uint16:
-		return k.Uint16s(v...)
+		return k.Uint16s(val...)
 	case *uint16:
-		return k.Uint16p(v)
+		return k.Uint16p(val)
 	case uint32:
-		return k.Uint32(v)
+		return k.Uint32(val)
 	case []uint32:
-		return k.Uint32s(v...)
+		return k.Uint32s(val...)
 	case *uint32:
-		return k.Uint32p(v)
+		return k.Uint32p(val)
 	case uint64:
-		return k.Uint64(v)
+		return k.Uint64(val)
 	case []uint64:
-		return k.Uint64s(v...)
+		return k.Uint64s(val...)
 	case *uint64:
-		return k.Uint64p(v)
+		return k.Uint64p(val)
 	case float32:
-		return k.Float32(v)
+		return k.Float32(val)
 	case []float32:
-		return k.Float32s(v...)
+		return k.Float32s(val...)
 	case *float32:
-		return k.Float32p(v)
+		return k.Float32p(val)
 	case float64:
-		return k.Float64(v)
+		return k.Float64(val)
 	case []float64:
-		return k.Float64s(v...)
+		return k.Float64s(val...)
 	case *float64:
-		return k.Float64p(v)
+		return k.Float64p(val)
 	case complex64:
-		return k.Complex64(v)
+		return k.Complex64(val)
 	case []complex64:
-		return k.Complex64s(v...)
+		return k.Complex64s(val...)
 	case *complex64:
-		return k.Complex64p(v)
+		return k.Complex64p(val)
 	case uintptr:
-		return k.Uintptr(v)
+		return k.Uintptr(val)
 	case []uintptr:
-		return k.Uintptrs(v...)
+		return k.Uintptrs(val...)
 	case *uintptr:
-		return k.Uintptrp(v)
+		return k.Uintptrp(val)
 	case []byte:
-		return k.Bytes(v)
+		return k.Bytes(val)
 	case time.Duration:
-		return k.Dureation(v)
+		return k.Dureation(val)
 	case []time.Duration:
-		return k.Dureations(v)
+		return k.Dureations(val)
 	case *time.Duration:
-		return k.Dureationp(v)
+		return k.Dureationp(val)
 	case time.Time:
-		return k.Time(v)
+		return k.Time(val)
 	case []time.Time:
-		return k.Times(v...)
+		return k.Times(val...)
 	case *time.Time:
-		return k.Timep(v)
+		return k.Timep(val)
 	case error:
-		return k.Error(v)
+		return k.Error(val)
 	case []error:
-		return k.Errors(v...)
+		return k.Errors(val...)
 	}
 
 	return Field{
diff --git a/field/value.go b/field/value.go
index 73cd951..d5846bb 100644
--- a/field/value.go
+++ b/field/value.go
@@ -265,31 +265,45 @@ func (v Value) asFloat64() float64 {
 }
 
 func (v Value) asComplex64() complex64 {
-	return v.value.(complex64)
+	cmplex, _ := v.value.(complex64)
+
+	return cmplex
 }
 
 func (v Value) asComplex128() complex128 {
-	return v.value.(complex128)
+	cmplex, _ := v.value.(complex128)
+
+	return cmplex
 }
 
 func (v Value) asUintptr() uintptr {
-	return v.value.(uintptr)
+	val, _ := v.value.(uintptr)
+
+	return val
 }
 
 func (v Value) asBinary() []byte {
-	return v.value.([]byte)
+	bytes, _ := v.value.([]byte)
+
+	return bytes
 }
 
 func (v Value) asDuration() time.Duration {
-	return v.value.(time.Duration)
+	duration, _ := v.value.(time.Duration)
+
+	return duration
 }
 
 func (v Value) asTime() time.Time {
-	return v.value.(time.Time)
+	value, _ := v.value.(time.Time)
+
+	return value
 }
 
 func (v Value) asError() error {
-	return v.value.(error)
+	err, _ := v.value.(error)
+
+	return err
 }
 
 func nilValue(t Type) Value {
diff --git a/handler/logrus/logger.go b/handler/logrus/logger.go
index 7e1942a..44f34dd 100644
--- a/handler/logrus/logger.go
+++ b/handler/logrus/logger.go
@@ -16,27 +16,27 @@ func Standard() log.Logger {
 
 // New create new logrus handler.
 func New(log *logrus.Logger) log.Logger {
-	return func(ctx context.Context, e *entry.Entry) (int, error) {
-		lrgFields := make(logrus.Fields, e.Fields().Len())
-		for _, field := range e.Fields() {
+	return func(ctx context.Context, data *entry.Entry) (int, error) {
+		lrgFields := make(logrus.Fields, data.Fields().Len())
+		for _, field := range data.Fields() {
 			lrgFields[string(field.Key())] = field.AsInterface()
 		}
 
 		entry := log.WithContext(ctx).WithFields(lrgFields)
 
-		switch e.Level() {
+		switch data.Level() {
 		case level.Emergency:
-			entry.Panic(e.Message())
+			entry.Panic(data.Message())
 		case level.Alert:
-			entry.Fatal(e.Message())
+			entry.Fatal(data.Message())
 		case level.Critical, level.Error:
-			entry.Error(e.Message())
+			entry.Error(data.Message())
 		case level.Warning:
-			entry.Warn(e.Message())
+			entry.Warn(data.Message())
 		case level.Notice, level.Info:
-			entry.Info(e.Message())
+			entry.Info(data.Message())
 		case level.Debug:
-			entry.Debug(e.Message())
+			entry.Debug(data.Message())
 		}
 
 		return 0, nil
diff --git a/handler/otel/helpers.go b/handler/otel/helpers.go
index b113041..722393d 100644
--- a/handler/otel/helpers.go
+++ b/handler/otel/helpers.go
@@ -38,19 +38,19 @@ func levels(lvl level.Level) Level {
 	return 0
 }
 
-func addEvent(ctx context.Context, e *entry.Entry) {
+func addEvent(ctx context.Context, data *entry.Entry) {
 	span := trace.SpanFromContext(ctx)
-	attrs := make([]attribute.KeyValue, 0, e.Fields().Len()+levelFields)
+	attrs := make([]attribute.KeyValue, 0, data.Fields().Len()+levelFields)
 
-	lvl := levels(e.Level())
+	lvl := levels(data.Level())
 	attrs = append(attrs,
 		attribute.String(fieldSeverityText, lvl.String()),
 		attribute.Int(fieldSeverityNumber, int(lvl)),
 	)
 
-	for _, field := range e.Fields() {
+	for _, field := range data.Fields() {
 		attrs = append(attrs, attribute.String(string(field.Key()), field.Value().String()))
 	}
 
-	span.AddEvent(e.Message(), trace.WithAttributes(attrs...))
+	span.AddEvent(data.Message(), trace.WithAttributes(attrs...))
 }
diff --git a/handler/zap/logger.go b/handler/zap/logger.go
index 8b0f200..29a7585 100644
--- a/handler/zap/logger.go
+++ b/handler/zap/logger.go
@@ -36,26 +36,26 @@ func Development(options ...zap.Option) log.Logger {
 }
 
 // New create handler by zap logger.
-func New(z *zap.Logger) log.Logger {
-	return func(ctx context.Context, e *entry.Entry) (int, error) {
-		zf := make([]zap.Field, e.Fields().Len())
-		for i, field := range e.Fields() {
+func New(logger *zap.Logger) log.Logger {
+	return func(ctx context.Context, data *entry.Entry) (int, error) {
+		zf := make([]zap.Field, data.Fields().Len())
+		for i, field := range data.Fields() {
 			zf[i] = zap.Any(string(field.Key()), field.AsInterface())
 		}
 
-		switch e.Level() {
+		switch data.Level() {
 		case level.Emergency:
-			z.Fatal(e.Message(), zf...)
+			logger.Fatal(data.Message(), zf...)
 		case level.Alert:
-			z.Panic(e.Message(), zf...)
+			logger.Panic(data.Message(), zf...)
 		case level.Critical, level.Error:
-			z.Error(e.Message(), zf...)
+			logger.Error(data.Message(), zf...)
 		case level.Warning:
-			z.Warn(e.Message(), zf...)
+			logger.Warn(data.Message(), zf...)
 		case level.Notice, level.Info:
-			z.Info(e.Message(), zf...)
+			logger.Info(data.Message(), zf...)
 		case level.Debug:
-			z.Debug(e.Message(), zf...)
+			logger.Debug(data.Message(), zf...)
 		}
 
 		return 0, nil
diff --git a/logger.go b/logger.go
index 387b5ed..b714ac2 100644
--- a/logger.go
+++ b/logger.go
@@ -37,13 +37,13 @@ func (l Logger) Write(in []byte) (int, error) {
 }
 
 func (l Logger) write(ctx context.Context, level level.Level, msg string, fields ...field.Field) (int, error) {
-	e := entry.Get()
+	writeEntry := entry.Get()
 
 	defer func() {
-		entry.Put(e)
+		entry.Put(writeEntry)
 	}()
 
-	return l(ctx, e.SetLevel(level).SetMessage(msg).Add(fields...))
+	return l(ctx, writeEntry.SetLevel(level).SetMessage(msg).Add(fields...))
 }
 
 func (l Logger) logKVs(ctx context.Context, level level.Level, msg string, args ...interface{}) {
@@ -63,21 +63,21 @@ func (l Logger) logln(ctx context.Context, level level.Level, args ...interface{
 }
 
 func (l Logger) kv(ctx context.Context, args ...interface{}) field.Fields {
-	e := entry.Get()
+	kvEntry := entry.Get()
 
 	defer func() {
-		entry.Put(e)
+		entry.Put(kvEntry)
 	}()
 
 	for i := 0; i < len(args); i++ {
 		if f, ok := args[i].(field.Field); ok {
-			e = e.Add(f)
+			kvEntry = kvEntry.Add(f)
 
 			continue
 		}
 
 		if i == len(args)-1 {
-			l.logKV(ctx, level.Critical, fmt.Sprint("Ignored key without a value.", args[i]), e.Fields()...)
+			l.logKV(ctx, level.Critical, fmt.Sprint("Ignored key without a value.", args[i]), kvEntry.Fields()...)
 
 			break
 		}
@@ -86,15 +86,15 @@ func (l Logger) kv(ctx context.Context, args ...interface{}) field.Fields {
 
 		key, val := args[i-1], args[i]
 		if keyStr, ok := key.(string); ok {
-			e = e.AddAny(keyStr, val)
+			kvEntry = kvEntry.AddAny(keyStr, val)
 
 			continue
 		}
 
-		l.logKV(ctx, level.Critical, fmt.Sprint("Ignored key-value pairs with non-string keys.", key, val), e.Fields()...)
+		l.logKV(ctx, level.Critical, fmt.Sprint("Ignored key-value pairs with non-string keys.", key, val), kvEntry.Fields()...)
 	}
 
-	return e.Fields()
+	return kvEntry.Fields()
 }
 
 // With adds middlewares to logger.
@@ -316,6 +316,7 @@ func (l Logger) Writer(ctx context.Context, level level.Level, fields ...field.F
 	}
 }
 
+//nolint: containedctx
 type writer struct {
 	ctx    context.Context
 	level  level.Level
diff --git a/logger_example_test.go b/logger_example_test.go
index d36b4c4..fefce82 100644
--- a/logger_example_test.go
+++ b/logger_example_test.go
@@ -52,13 +52,16 @@ func ExampleNew_debugKV() {
 
 func ExampleNew_level() {
 	logger := log.New(log.WithStdout()).With(log.WithLevel("level", level.Error))
-	logger.Info(ctx, "same message")
-	// Output:
-
 	logger.Err(ctx, "same error message")
 	// Output: msg="same error message" level=error
 }
 
+func ExampleNew_level_info() {
+	logger := log.New(log.WithStdout()).With(log.WithLevel("level", level.Error))
+	logger.Info(ctx, "same message")
+	// Output:
+}
+
 func ExampleNew_jsonFormat() {
 	logger := log.New(log.WithStdout(), log.WithJSONFormat()).
 		With(
@@ -66,7 +69,7 @@ func ExampleNew_jsonFormat() {
 			log.GoVersion("go-version"),
 		)
 	logger.Err(ctx, "same error message")
-	// Output: {"go-version":"go1.17.6","level":"error","msg":"same error message"}
+	// Output: {"go-version":"go1.17.8","level":"error","msg":"same error message"}
 }
 
 func ExampleNew_textEncoding() {
@@ -79,8 +82,8 @@ func ExampleNew_textEncoding() {
 	logger.InfoKVs(ctx, "same info message", "api-version", 0.1)
 
 	// Output:
-	// msg="same error message" level=error go-version=go1.17.6
-	// msg="same info message" api-version=0.1 level=info go-version=go1.17.6
+	// msg="same error message" level=error go-version=go1.17.8
+	// msg="same info message" api-version=0.1 level=info go-version=go1.17.8
 }
 
 type ctxKey string
@@ -102,7 +105,7 @@ func ExampleWith() {
 		levelInfo, log.WithContextValue(requestID), log.KeyValue("api", "0.1.0"), log.GoVersion("go"),
 	)
 	logger.Info(vctx, "same message")
-	// Output: msg="same message" level=info requestID=6a5fa048-7181-11ea-bc55-0242ac130003 api=0.1.0 go=go1.17.6
+	// Output: msg="same message" level=info requestID=6a5fa048-7181-11ea-bc55-0242ac130003 api=0.1.0 go=go1.17.8
 }
 
 func ExampleLogger_Print() {
@@ -111,7 +114,7 @@ func ExampleLogger_Print() {
 		levelInfo, log.KeyValue("client", "http"), log.KeyValue("api", "0.1.0"), log.GoVersion("go"),
 	)
 	logger.Print("same message")
-	// Output: msg="same message" level=info client=http api=0.1.0 go=go1.17.6
+	// Output: msg="same message" level=info client=http api=0.1.0 go=go1.17.8
 }
 
 func ExamplePrint() {
diff --git a/middleware.go b/middleware.go
index fa3e558..d59cc33 100644
--- a/middleware.go
+++ b/middleware.go
@@ -30,7 +30,7 @@ func With(logger Logger, mw ...Middleware) Logger {
 
 	lastI := len(mw) - 1
 
-	return func(ctx context.Context, e *entry.Entry) (int, error) {
+	return func(ctx context.Context, data *entry.Entry) (int, error) {
 		var (
 			chainHandler func(context.Context, *entry.Entry) (int, error)
 			curI         int
@@ -47,7 +47,7 @@ func With(logger Logger, mw ...Middleware) Logger {
 			return n, err
 		}
 
-		return mw[0](ctx, e, chainHandler)
+		return mw[0](ctx, data, chainHandler)
 	}
 }
 
@@ -62,16 +62,16 @@ func WithLevel(key string, lvl level.Level) Middleware {
 	}
 }
 
-func WithClosure(ctx context.Context, e *entry.Entry, handler Logger) (int, error) {
-	for i, field := range e.Fields() {
+func WithClosure(ctx context.Context, data *entry.Entry, handler Logger) (int, error) {
+	for i, field := range data.Fields() {
 		if field.Type().IsAny() {
 			if f, ok := field.AsInterface().(func() string); ok {
-				e.Fields().Set(i, field.Key().String(f()))
+				data.Fields().Set(i, field.Key().String(f()))
 			}
 		}
 	}
 
-	return handler(ctx, e)
+	return handler(ctx, data)
 }
 
 // KeyValue add field by const key value.
diff --git a/writter.go b/writter.go
index 9c069d9..2387c7c 100644
--- a/writter.go
+++ b/writter.go
@@ -15,19 +15,19 @@ import (
 
 // New creates standart logger.
 func New(opts ...Option) Logger {
-	l := log{e: stringFormat(), w: os.Stderr}
+	logger := log{e: stringFormat(), w: os.Stderr}
 
 	for _, opt := range opts {
-		opt(&l)
+		opt(&logger)
 	}
 
 	return func(_ context.Context, entry *entry.Entry) (int, error) {
-		b, err := l.e(entry)
+		b, err := logger.e(entry)
 		if err != nil {
 			return 0, fmt.Errorf("enode err: %w", err)
 		}
 
-		n, err := l.w.Write(b)
+		n, err := logger.w.Write(b)
 		if err != nil {
 			return 0, fmt.Errorf("failed write: %w", err)
 		}
@@ -85,27 +85,27 @@ func stringFormat() func(entry *entry.Entry) ([]byte, error) {
 	}
 
 	return func(entry *entry.Entry) ([]byte, error) {
-		b := pool.Get().(*bytes.Buffer)
-		b.Reset()
+		buf := pool.Get().(*bytes.Buffer)
+		buf.Reset()
 
 		defer func() {
-			pool.Put(b)
+			pool.Put(buf)
 		}()
 
-		b.WriteString("msg=\"")
-		b.WriteString(strings.TrimSpace(entry.Message()))
-		b.WriteString("\"")
+		buf.WriteString("msg=\"")
+		buf.WriteString(strings.TrimSpace(entry.Message()))
+		buf.WriteString("\"")
 
 		for _, field := range entry.Fields() {
-			b.WriteString(" ")
-			b.WriteString(string(field.Key()))
-			b.WriteString("=")
-			b.WriteString(field.Value().String())
+			buf.WriteString(" ")
+			buf.WriteString(string(field.Key()))
+			buf.WriteString("=")
+			buf.WriteString(field.Value().String())
 		}
 
-		b.WriteString("\n")
+		buf.WriteString("\n")
 
-		return b.Bytes(), nil
+		return buf.Bytes(), nil
 	}
 }