diff --git a/cli/go.mod b/cli/go.mod
index a5d4415..3fa76bd 100644
--- a/cli/go.mod
+++ b/cli/go.mod
@@ -6,6 +6,8 @@ replace local/storage => ../
 
 replace local/args => ../../args
 
+replace local/logb => ../../logb
+
 require (
 	local/args v0.0.0-00010101000000-000000000000
 	local/storage v0.0.0-00010101000000-000000000000
diff --git a/yaml.go b/yaml.go
index 2d4ccdc..089a82c 100755
--- a/yaml.go
+++ b/yaml.go
@@ -11,6 +11,8 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"strings"
+	"unicode"
 
 	yaml "gopkg.in/yaml.v2"
 )
@@ -83,8 +85,11 @@ func (y *Yaml) GetStream(key string, ns ...string) (io.Reader, error) {
 	if !ok {
 		return nil, ErrNotFound
 	}
-	b, err := base64.StdEncoding.DecodeString(s)
-	return bytes.NewReader(b), err
+	if strings.HasPrefix("b64://", s) {
+		b, err := base64.StdEncoding.DecodeString(strings.TrimPrefix(s, "b64://"))
+		return bytes.NewReader(b), err
+	}
+	return strings.NewReader(s), nil
 }
 
 func (y *Yaml) Set(key string, value []byte, ns ...string) error {
@@ -99,6 +104,15 @@ func (y *Yaml) Del(key string, ns ...string) error {
 	return y.SetStream(key, nil, ns...)
 }
 
+func isASCII(s string) bool {
+	for _, c := range s {
+		if c > unicode.MaxASCII {
+			return false
+		}
+	}
+	return true
+}
+
 func (y *Yaml) SetStream(key string, r io.Reader, ns ...string) error {
 	namespace := resolve.Namespace(ns)
 	var v interface{} = nil
@@ -107,7 +121,11 @@ func (y *Yaml) SetStream(key string, r io.Reader, ns ...string) error {
 		if err != nil {
 			return err
 		}
-		v = base64.StdEncoding.EncodeToString(b)
+		if isASCII(string(b)) {
+			v = string(b)
+		} else {
+			v = "b64://" + base64.StdEncoding.EncodeToString(b)
+		}
 	}
 	m, err := y.getMap()
 	if err != nil {