diff --git a/db.go b/db.go
index 68fd83c..303f504 100644
--- a/db.go
+++ b/db.go
@@ -2,6 +2,7 @@ package storage
 
 import (
 	"fmt"
+	"strings"
 )
 
 type DB interface {
@@ -20,6 +21,8 @@ func New(key Type, params ...string) (db DB, err error) {
 	}()
 	err = ErrNotImpl
 	switch key {
+	case REDIS:
+		db, err = NewRedis(params[0], params[1], params[2])
 	case MAP:
 		db = NewMap()
 		err = nil
@@ -44,7 +47,13 @@ func New(key Type, params ...string) (db DB, err error) {
 func resolveNamespace(ns []string) string {
 	namespace := DefaultNamespace
 	if len(ns) > 0 {
-		namespace = ns[0]
+		segments := []string{}
+		for i := range ns {
+			if ns[i] != "" {
+				segments = append(segments, ns[i])
+			}
+		}
+		namespace = strings.Join(segments, ".")
 	}
 	return namespace
 }
diff --git a/db_test.go b/db_test.go
index 8819fc1..d068f17 100644
--- a/db_test.go
+++ b/db_test.go
@@ -58,6 +58,12 @@ func TestImplementations(t *testing.T) {
 		cases = append(cases, cacheFile)
 	}
 
+	if redis, err := NewRedis("localhost:6379", "", ""); err != nil {
+		t.Errorf("cannot make redis: %v", err)
+	} else {
+		cases = append(cases, redis)
+	}
+
 	if bolt, err := NewBolt(path.Join(dir, "bolt")); err != nil {
 		t.Errorf("cannot make bolt: %v", err)
 	} else {
@@ -155,6 +161,10 @@ func TestToFromString(t *testing.T) {
 			key: "map",
 			t:   MAP,
 		},
+		{
+			key: "redis",
+			t:   REDIS,
+		},
 		{
 			key: "minio",
 			t:   MINIO,
diff --git a/mongo.go b/mongo.go
index ca698e9..332c857 100644
--- a/mongo.go
+++ b/mongo.go
@@ -5,12 +5,12 @@ import (
 	"strings"
 	"time"
 
-	"github.com/mongodb/mongo-go-driver/mongo"
-	"github.com/mongodb/mongo-go-driver/mongo/options"
-	"github.com/mongodb/mongo-go-driver/mongo/readconcern"
-	"github.com/mongodb/mongo-go-driver/mongo/readpref"
-	"github.com/mongodb/mongo-go-driver/mongo/writeconcern"
-	"gopkg.in/mgo.v2/bson"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.mongodb.org/mongo-driver/mongo/readconcern"
+	"go.mongodb.org/mongo-driver/mongo/readpref"
+	"go.mongodb.org/mongo-driver/mongo/writeconcern"
 )
 
 type Mongo struct {
@@ -26,8 +26,8 @@ func NewMongo(addr string, auth ...string) (*Mongo, error) {
 			Password: auth[1],
 		})
 	}
-	db, err := mongo.NewClientWithOptions(
-		"mongodb://"+addr,
+	db, err := mongo.NewClient(
+		options.Client().ApplyURI("mongodb://"+addr),
 		options.Client().SetReadConcern(readconcern.Local()),
 		options.Client().SetReadPreference(readpref.PrimaryPreferred()),
 		options.Client().SetWriteConcern(writeconcern.New(
@@ -68,8 +68,8 @@ func (mg *Mongo) Get(key string, ns ...string) ([]byte, error) {
 		return nil, ErrNotFound
 	}
 
-	elem, err := cursor.DecodeBytes()
-	if err != nil {
+	var elem bson.Raw
+	if err := cursor.Decode(&elem); err != nil {
 		return nil, err
 	}
 	raw, err := elem.LookupErr("value")
diff --git a/redis.go b/redis.go
new file mode 100644
index 0000000..205c9a7
--- /dev/null
+++ b/redis.go
@@ -0,0 +1,57 @@
+package storage
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/gomodule/redigo/redis"
+)
+
+type Redis struct {
+	client redis.Conn
+}
+
+func NewRedis(addr, user, pass string) (*Redis, error) {
+	opts := []redis.DialOption{}
+	if pass != "" {
+		opts = append(opts, redis.DialPassword(pass))
+	}
+	opts = append(opts, redis.DialConnectTimeout(time.Second*10))
+	client, err := redis.Dial("tcp", addr, opts...)
+	return &Redis{
+		client: client,
+	}, err
+}
+
+func (m *Redis) String() string {
+	return fmt.Sprintf("%v", *m)
+}
+
+func (m *Redis) Close() error {
+	return m.client.Close()
+}
+
+func (m *Redis) Get(key string, ns ...string) ([]byte, error) {
+	key = resolveNamespace(append(ns, key))
+	log.Println(key)
+	resp, err := m.client.Do("GET", key)
+	if err != nil {
+		return nil, err
+	}
+	if resp == nil {
+		return nil, ErrNotFound
+	}
+	b, ok := resp.([]byte)
+	if !ok {
+		return nil, errors.New("resp not a []byte")
+	}
+	return b, nil
+}
+
+func (m *Redis) Set(key string, value []byte, ns ...string) error {
+	namespace := resolveNamespace(append(ns, key))
+	_, err := m.client.Do("SET", namespace, value)
+	return err
+}
diff --git a/type.go b/type.go
index b90c987..23944dc 100644
--- a/type.go
+++ b/type.go
@@ -8,7 +8,9 @@ type Type int
 
 const (
 	MAP             = Type(iota)
+	REDIS           = Type(iota)
 	BOLT            = Type(iota)
+	COCKROACH       = Type(iota)
 	CACHE           = Type(iota)
 	LEVELDB         = Type(iota)
 	MEMCACHE        = Type(iota)
@@ -19,8 +21,12 @@ const (
 
 func (t Type) String() string {
 	switch t {
+	case REDIS:
+		return "redis"
 	case MAP:
 		return "map"
+	case COCKROACH:
+		return "cockroach"
 	case BOLT:
 		return "bolt"
 	case MINIO: