diff --git a/config.go b/config.go
index 6ef8200..cec86e7 100644
--- a/config.go
+++ b/config.go
@@ -41,7 +41,7 @@ func init() {
 func SetConfigPath(in string) error { return _c.SetConfigPath(in) }
 func (c *config) SetConfigPath(in string) error {
 	if in != "" {
-		absin, err := absPathify(in)
+		absin, err := ABSPathify(in)
 		if nil != err {
 			return err
 		}
@@ -93,7 +93,7 @@ func Save(target interface{}, file string, overWrite bool) error {
 func (c *config) Save(target interface{}, file string, overWrite bool) error {
 	var absPath string
 	var err error
-	if absPath, err = absPathify(file); nil != err {
+	if absPath, err = ABSPathify(file); nil != err {
 		return err
 	}
 
@@ -107,8 +107,8 @@ func (c *config) getConfigFiles(files ...string) []string {
 
 	for _, file := range files {
 		// check configuration
-		if absin, err := absPathify(file); nil == err {
-			if exists(absin) {
+		if absin, err := ABSPathify(file); nil == err {
+			if Exists(absin) {
 				results = append(results, absin)
 			}
 		}
@@ -116,8 +116,8 @@ func (c *config) getConfigFiles(files ...string) []string {
 
 	for _, file := range files {
 		// check configuration
-		if absin, err := absPathify(filepath.Join(c.configPath, file)); nil == err {
-			if exists(absin) {
+		if absin, err := ABSPathify(filepath.Join(c.configPath, file)); nil == err {
+			if Exists(absin) {
 				results = append(results, absin)
 			}
 		}
diff --git a/util.go b/util.go
index 594bd14..4024a9d 100644
--- a/util.go
+++ b/util.go
@@ -16,7 +16,7 @@ import (
 	yaml "gopkg.in/yaml.v2"
 )
 
-func absPathify(inPath string) (string, error) {
+func ABSPathify(inPath string) (string, error) {
 	if strings.HasPrefix(inPath, "$HOME") {
 		inPath = userHomeDir() + inPath[5:]
 	}
@@ -49,7 +49,7 @@ func userHomeDir() string {
 	return os.Getenv("HOME")
 }
 
-func exists(path string) bool {
+func Exists(path string) bool {
 	if fileInfo, err := os.Stat(path); err == nil && fileInfo.Mode().IsRegular() {
 		return true
 	}
@@ -161,7 +161,7 @@ func getPrefixForStruct(prefixes []string, fieldStruct *reflect.StructField) []s
 func marshalFile(target interface{}, file string, overWrite bool) error {
 	var f *os.File
 	var err error
-	if exists(file) {
+	if Exists(file) {
 		if !overWrite {
 			return fmt.Errorf("Config: File[%s] is exist", file)
 		}