diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index b1fdb76..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-language: go
-
-go:
-  - "1.9"
-  - "1.10"
-
-before_install:
-  - go get github.com/mattn/goveralls
-
-script:
-  - $GOPATH/bin/goveralls -v -service=travis-ci -package=github.com/subchen/go-log
diff --git a/Gopkg.lock b/Gopkg.lock
deleted file mode 100644
index aa7d75a..0000000
--- a/Gopkg.lock
+++ /dev/null
@@ -1,24 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/crypto"
-  packages = ["ssh/terminal"]
-  revision = "1a580b3eff7814fc9b40602fd35256c63b50f491"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/sys"
-  packages = [
-    "unix",
-    "windows"
-  ]
-  revision = "7c87d13f8e835d2fb3a70a2912c811ed0c1d241b"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  inputs-digest = "5d23260104de1fc6bee0a07cb064f1b57081935b7958acdb627d18dd9c80ce02"
-  solver-name = "gps-cdcl"
-  solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
deleted file mode 100644
index 3208079..0000000
--- a/Gopkg.toml
+++ /dev/null
@@ -1,35 +0,0 @@
-# Gopkg.toml example
-#
-# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
-# for detailed Gopkg.toml documentation.
-#
-# required = ["github.com/user/thing/cmd/thing"]
-# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
-#
-# [[constraint]]
-#   name = "github.com/user/project"
-#   version = "1.0.0"
-#
-# [[constraint]]
-#   name = "github.com/user/project2"
-#   branch = "dev"
-#   source = "github.com/myfork/project2"
-#
-# [[override]]
-#   name = "github.com/x/y"
-#   version = "2.4.0"
-#
-# [prune]
-#   non-go = false
-#   go-tests = true
-#   unused-packages = true
-
-
-[[constraint]]
-  name = "golang.org/x/crypto"
-  branch = "master"
-
-[prune]
-  non-go = true
-  go-tests = true
-  unused-packages = true
diff --git a/README.md b/README.md
index ef64c84..e66f666 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ package main
 import (
 	"os"
 	"errors"
-	"github.com/fangdingjun/go-log"
+	log "github.com/fangdingjun/go-log/v5"
 )
 
 func main() {
@@ -56,8 +56,7 @@ Default log to console, you can set `Logger.Out` to set a file writer into log.
 
 ```go
 import (
-	"github.com/fangdingjun/go-log"
-	"github.com/fangdingjun/go-log/log"
+	log "github.com/fangdingjun/go-log/v5"
 )
 
 log.Default.Out = &log.FixedSizeFileWriter{
@@ -107,7 +106,7 @@ io.MultiWriter(
 
 ```go
 import (
-	"github.com/fangdingjun/go-log"
+	log "github.com/fangdingjun/go-log/v5"
 )
 
 log.Default.Formatter = new(log.TextFormatter)
@@ -118,7 +117,7 @@ log.Default.Formatter = new(log.TextFormatter)
 
 ```go
 import (
-	"github.com/fangdingjun/go-log"
+	log "github.com/fangdingjun/go-log/v5"
 )
 
 func main() {
diff --git a/doc.go b/doc.go
index 98bba6b..608d5dd 100644
--- a/doc.go
+++ b/doc.go
@@ -9,7 +9,7 @@ package main
 
     import (
     	"os"
-    	"github.com/fangdingjun/go-log"
+    	log "github.com/fangdingjun/go-log/v5"
     )
 
     func main() {
@@ -31,7 +31,7 @@ You also can config `log.Default` or new `log.Logger` to customize formatter and
 
     import (
     	"os"
-    	"github.com/fangdingjun/go-log"
+    	log "github.com/fangdingjun/go-log/v5"
     )
 
     func main() {
diff --git a/examples/main.go b/examples/main.go
index e8e98c3..a92047e 100644
--- a/examples/main.go
+++ b/examples/main.go
@@ -3,7 +3,7 @@ package main
 import (
 	"os"
 
-	"github.com/fangdingjun/go-log"
+	log "github.com/fangdingjun/go-log/v5"
 )
 
 func main() {
diff --git a/go.mod b/go.mod
index a442d5c..7b0f2f6 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/fangdingjun/go-log/v5
 
 go 1.13
 
-require golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
+require golang.org/x/crypto v0.0.0-20190909091759-094676da4a83
diff --git a/go.sum b/go.sum
index 982bcf9..e924e8c 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,7 @@
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
+golang.org/x/crypto v0.0.0-20190909091759-094676da4a83 h1:mgAKeshyNqWKdENOnQsg+8dRTwZFIwFaO3HNl52sweA=
+golang.org/x/crypto v0.0.0-20190909091759-094676da4a83/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=