diff --git a/main.go b/main.go
index 141e627..ff3bae8 100644
--- a/main.go
+++ b/main.go
@@ -4,6 +4,7 @@ package config
 import (
 	errors "errors"
 	io "io"
+	fs "io/fs"
 	os "os"
 	path "path"
 	reflect "reflect"
@@ -32,10 +33,12 @@ type OnConfigBeforeValidationOptions struct {
 }
 
 type LoadConfigsOptionsTOML struct {
-	FileToJSON   func(string) ([]byte, error)
-	StringToJSON func(string) ([]byte, error)
-	BytesToJSON  func([]byte) ([]byte, error)
-	ReaderToJSON func(io.Reader) ([]byte, error)
+	FileToJSON               func(string) ([]byte, error)
+	StringToJSON             func(string) ([]byte, error)
+	BytesToJSON              func([]byte) ([]byte, error)
+	ReaderToJSON             func(io.Reader) ([]byte, error)
+	FileReaderToJSON         func(file fs.File, closeFile bool) ([]byte, error)
+	FileReaderCallbackToJSON func(getFileCallback func() (fs.File, error)) ([]byte, error)
 }
 
 type LoadConfigsOptions struct {
@@ -87,10 +90,12 @@ func New(options *NewOptions) (*Config, error) {
 	if options.LoadConfigs != nil {
 		byteSlicesUser, err := options.LoadConfigs(&LoadConfigsOptions{
 			TOML: &LoadConfigsOptionsTOML{
-				FileToJSON:   file.TOMLFileToJSON,
-				BytesToJSON:  file.TOMLBytesToJSON,
-				StringToJSON: file.TOMLStringToJSON,
-				ReaderToJSON: file.TOMLReaderToJSON,
+				FileToJSON:               file.TOMLFileToJSON,
+				BytesToJSON:              file.TOMLBytesToJSON,
+				StringToJSON:             file.TOMLStringToJSON,
+				ReaderToJSON:             file.TOMLReaderToJSON,
+				FileReaderToJSON:         file.TOMLFileReaderToJSON,
+				FileReaderCallbackToJSON: file.TOMLFileReaderCallbackToJSON,
 			},
 			RunEnv: envRun,
 		})
diff --git a/pkg/file/file.go b/pkg/file/file.go
index 00bb61c..b02a635 100644
--- a/pkg/file/file.go
+++ b/pkg/file/file.go
@@ -2,16 +2,13 @@
 package file
 
 import (
-	ioutil "io/ioutil"
 	os "os"
 	filepath "path/filepath"
 
 	jsoniter "github.com/json-iterator/go"
 )
 
-var (
-	json = jsoniter.ConfigCompatibleWithStandardLibrary
-)
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
 
 type WriteFileOptions struct {
 	PathFile      string
@@ -24,7 +21,7 @@ func WriteFile(options *WriteFileOptions) error {
 		return err
 	}
 
-	err = ioutil.WriteFile(options.PathFile, options.ContentsBytes, 0644)
+	err = os.WriteFile(options.PathFile, options.ContentsBytes, 0644)
 	if err != nil {
 		return err
 	}
diff --git a/pkg/file/toml.go b/pkg/file/toml.go
index feefff1..00f1a35 100644
--- a/pkg/file/toml.go
+++ b/pkg/file/toml.go
@@ -2,10 +2,38 @@ package file
 
 import (
 	io "io"
+	fs "io/fs"
 
 	gotoml "github.com/pelletier/go-toml"
 )
 
+func TOMLFileReaderCallbackToJSON(getFileCallback func() (fs.File, error)) ([]byte, error) {
+	file, err := getFileCallback()
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	res, err := gotoml.LoadReader(file)
+	if err != nil {
+		return nil, err
+	}
+
+	return JSONGenericMapToBytes(res.ToMap())
+}
+
+func TOMLFileReaderToJSON(input fs.File, doClose bool) ([]byte, error) {
+	res, err := gotoml.LoadReader(input)
+	if err != nil {
+		return nil, err
+	}
+
+	if doClose {
+		defer input.Close()
+	}
+	return JSONGenericMapToBytes(res.ToMap())
+}
+
 func TOMLReaderToJSON(input io.Reader) ([]byte, error) {
 	res, err := gotoml.LoadReader(input)
 	if err != nil {