diff --git a/README.md b/README.md
index 1327d13..cb05883 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,4 @@
-> :tada: v2 is released! It contains breaking change. If you still want to use v1, please replace `github.com/otiai10/gosseract` with `github.com/otiai10/gosseract/v1/gosseract` and it is exactly the same thing as v1 implementation_
-
-# Gosseract-OCR
+# gosseract OCR
 [![Build Status](https://travis-ci.org/otiai10/gosseract.svg?branch=master)](https://travis-ci.org/otiai10/gosseract)
 [![codecov](https://codecov.io/gh/otiai10/gosseract/branch/master/graph/badge.svg)](https://codecov.io/gh/otiai10/gosseract)
 [![Go Report Card](https://goreportcard.com/badge/github.com/otiai10/gosseract)](https://goreportcard.com/report/github.com/otiai10/gosseract)
diff --git a/all_test.go b/all_test.go
index 04217be..5a99026 100644
--- a/all_test.go
+++ b/all_test.go
@@ -79,7 +79,7 @@ func TestClient_HTML(t *testing.T) {
 	defer client.Close()
 	client.SetImage("./test/data/001-gosseract.png")
 	client.SetWhitelist("otiai10/gosseract")
-	out, err := client.HTML()
+	out, err := client.HOCRText()
 	Expect(t, err).ToBe(nil)
 
 	tokenizer := html.NewTokenizer(strings.NewReader(out))
@@ -94,13 +94,19 @@ func TestClient_HTML(t *testing.T) {
 	Expect(t, texts).ToBe([]string{"otiai10", "/", "gosseract"})
 
 	When(t, "only invalid languages are given", func(t *testing.T) {
+		client := NewClient()
+		defer client.Close()
 		client.SetLanguage("foo")
-		_, err := client.HTML()
+		client.SetImage("./test/data/001-gosseract.png")
+		_, err := client.HOCRText()
 		Expect(t, err).Not().ToBe(nil)
 	})
 	When(t, "undefined key-value is tried to be set", func(t *testing.T) {
+		client := NewClient()
+		defer client.Close()
 		client.SetVariable("foobar", "hoge")
-		_, err := client.HTML()
+		client.SetImage("./test/data/001-gosseract.png")
+		_, err := client.HOCRText()
 		Expect(t, err).Not().ToBe(nil)
 	})
 }
diff --git a/client.go b/client.go
index af9d3fe..79d67d2 100644
--- a/client.go
+++ b/client.go
@@ -69,50 +69,50 @@ func NewClient() *Client {
 }
 
 // Close frees allocated API. This MUST be called for ANY client constructed by "NewClient" function.
-func (c *Client) Close() (err error) {
+func (client *Client) Close() (err error) {
 	// defer func() {
 	// 	if e := recover(); e != nil {
 	// 		err = fmt.Errorf("%v", e)
 	// 	}
 	// }()
-	C.Free(c.api)
+	C.Free(client.api)
 	return err
 }
 
 // SetImage sets path to image file to be processed OCR.
-func (c *Client) SetImage(imagepath string) *Client {
-	c.ImagePath = imagepath
-	return c
+func (client *Client) SetImage(imagepath string) *Client {
+	client.ImagePath = imagepath
+	return client
 }
 
 // SetLanguage sets languages to use. English as default.
-func (c *Client) SetLanguage(langs ...string) *Client {
-	c.Languages = langs
-	return c
+func (client *Client) SetLanguage(langs ...string) *Client {
+	client.Languages = langs
+	return client
 }
 
 // SetWhitelist sets whitelist chars.
 // See official documentation for whitelist here https://github.com/tesseract-ocr/tesseract/wiki/ImproveQuality#dictionaries-word-lists-and-patterns
-func (c *Client) SetWhitelist(whitelist string) *Client {
-	return c.SetVariable("tessedit_char_whitelist", whitelist)
+func (client *Client) SetWhitelist(whitelist string) *Client {
+	return client.SetVariable("tessedit_char_whitelist", whitelist)
 }
 
 // SetVariable sets parameters, representing tesseract::TessBaseAPI->SetVariable.
 // See official documentation here https://zdenop.github.io/tesseract-doc/classtesseract_1_1_tess_base_a_p_i.html#a2e09259c558c6d8e0f7e523cbaf5adf5
-func (c *Client) SetVariable(key, value string) *Client {
-	c.Variables[key] = value
-	return c
+func (client *Client) SetVariable(key, value string) *Client {
+	client.Variables[key] = value
+	return client
 }
 
 // SetPageSegMode sets "Page Segmentation Mode" (PSM) to detect layout of characters.
 // See official documentation for PSM here https://github.com/tesseract-ocr/tesseract/wiki/ImproveQuality#page-segmentation-method
-func (c *Client) SetPageSegMode(mode PageSegMode) *Client {
-	c.PageSegMode = &mode
-	return c
+func (client *Client) SetPageSegMode(mode PageSegMode) *Client {
+	client.PageSegMode = &mode
+	return client
 }
 
 // SetConfigFile sets the file path to config file.
-func (c *Client) SetConfigFile(fpath string) error {
+func (client *Client) SetConfigFile(fpath string) error {
 	info, err := os.Stat(fpath)
 	if err != nil {
 		return err
@@ -120,36 +120,36 @@ func (c *Client) SetConfigFile(fpath string) error {
 	if info.IsDir() {
 		return fmt.Errorf("the specified config file path seems to be a directory")
 	}
-	c.ConfigFilePath = fpath
+	client.ConfigFilePath = fpath
 	return nil
 }
 
 // It's due to the caller to free this char pointer.
-func (c *Client) charLangs() *C.char {
+func (client *Client) charLangs() *C.char {
 	var langs *C.char
-	if len(c.Languages) != 0 {
-		langs = C.CString(strings.Join(c.Languages, "+"))
+	if len(client.Languages) != 0 {
+		langs = C.CString(strings.Join(client.Languages, "+"))
 	}
 	return langs
 }
 
 // It's due to the caller to free this char pointer.
-func (c *Client) charConfig() *C.char {
+func (client *Client) charConfig() *C.char {
 	var config *C.char
-	if _, err := os.Stat(c.ConfigFilePath); err == nil {
-		config = C.CString(c.ConfigFilePath)
+	if _, err := os.Stat(client.ConfigFilePath); err == nil {
+		config = C.CString(client.ConfigFilePath)
 	}
 	return config
 }
 
 // Initialize tesseract::TessBaseAPI
 // TODO: add tessdata prefix
-func (c *Client) init() error {
-	langs := c.charLangs()
+func (client *Client) init() error {
+	langs := client.charLangs()
 	defer C.free(unsafe.Pointer(langs))
-	config := c.charConfig()
+	config := client.charConfig()
 	defer C.free(unsafe.Pointer(config))
-	res := C.Init(c.api, nil, langs, config)
+	res := C.Init(client.api, nil, langs, config)
 	if res != 0 {
 		// TODO: capture and vacuum stderr from Cgo
 		return fmt.Errorf("failed to initialize TessBaseAPI with code %d", res)
@@ -159,45 +159,45 @@ func (c *Client) init() error {
 
 // Prepare tesseract::TessBaseAPI options,
 // must be called after `init`.
-func (c *Client) prepare() error {
+func (client *Client) prepare() error {
 	// Set Image by giving path
-	imagepath := C.CString(c.ImagePath)
+	imagepath := C.CString(client.ImagePath)
 	defer C.free(unsafe.Pointer(imagepath))
-	C.SetImage(c.api, imagepath)
+	C.SetImage(client.api, imagepath)
 
-	for key, value := range c.Variables {
-		if ok := c.bind(key, value); !ok {
+	for key, value := range client.Variables {
+		if ok := client.bind(key, value); !ok {
 			return fmt.Errorf("failed to set variable with key(%s):value(%s)", key, value)
 		}
 	}
 
-	if c.PageSegMode != nil {
-		mode := C.int(*c.PageSegMode)
-		C.SetPageSegMode(c.api, mode)
+	if client.PageSegMode != nil {
+		mode := C.int(*client.PageSegMode)
+		C.SetPageSegMode(client.api, mode)
 	}
 	return nil
 }
 
 // Binds variable to API object.
 // Must be called from inside `prepare`.
-func (c *Client) bind(key, value string) bool {
+func (client *Client) bind(key, value string) bool {
 	k, v := C.CString(key), C.CString(value)
 	defer C.free(unsafe.Pointer(k))
 	defer C.free(unsafe.Pointer(v))
-	res := C.SetVariable(c.api, k, v)
+	res := C.SetVariable(client.api, k, v)
 	return bool(res)
 }
 
 // Text finally initialize tesseract::TessBaseAPI, execute OCR and extract text detected as string.
-func (c *Client) Text() (out string, err error) {
-	if err = c.init(); err != nil {
+func (client *Client) Text() (out string, err error) {
+	if err = client.init(); err != nil {
 		return
 	}
-	if err = c.prepare(); err != nil {
+	if err = client.prepare(); err != nil {
 		return
 	}
-	out = C.GoString(C.UTF8Text(c.api))
-	if c.Trim {
+	out = C.GoString(C.UTF8Text(client.api))
+	if client.Trim {
 		out = strings.Trim(out, "\n")
 	}
 	return out, err
@@ -205,13 +205,13 @@ func (c *Client) Text() (out string, err error) {
 
 // HTML finally initialize tesseract::TessBaseAPI, execute OCR and returns hOCR text.
 // See https://en.wikipedia.org/wiki/HOCR for more information of hOCR.
-func (c *Client) HTML() (out string, err error) {
-	if err = c.init(); err != nil {
+func (client *Client) HOCRText() (out string, err error) {
+	if err = client.init(); err != nil {
 		return
 	}
-	if err = c.prepare(); err != nil {
+	if err = client.prepare(); err != nil {
 		return
 	}
-	out = C.GoString(C.HOCRText(c.api))
+	out = C.GoString(C.HOCRText(client.api))
 	return
 }
diff --git a/v1/gosseract/.samples/option/digest000.txt b/v1/gosseract/.samples/option/digest000.txt
deleted file mode 100644
index e07aed5..0000000
--- a/v1/gosseract/.samples/option/digest000.txt
+++ /dev/null
@@ -1 +0,0 @@
-tessedit_char_whitelist :0123456789
diff --git a/v1/gosseract/.samples/option/digest001.txt b/v1/gosseract/.samples/option/digest001.txt
deleted file mode 100644
index 22af8d8..0000000
--- a/v1/gosseract/.samples/option/digest001.txt
+++ /dev/null
@@ -1 +0,0 @@
-tessedit_char_whitelist 403
diff --git a/v1/gosseract/.samples/png/sample000.png b/v1/gosseract/.samples/png/sample000.png
deleted file mode 100644
index 4374af1..0000000
Binary files a/v1/gosseract/.samples/png/sample000.png and /dev/null differ
diff --git a/v1/gosseract/.samples/png/sample001.png b/v1/gosseract/.samples/png/sample001.png
deleted file mode 100644
index cd7cf8b..0000000
Binary files a/v1/gosseract/.samples/png/sample001.png and /dev/null differ
diff --git a/v1/gosseract/.samples/png/sample002.png b/v1/gosseract/.samples/png/sample002.png
deleted file mode 100644
index ed5e711..0000000
Binary files a/v1/gosseract/.samples/png/sample002.png and /dev/null differ
diff --git a/v1/gosseract/.samples/png/sample003.png b/v1/gosseract/.samples/png/sample003.png
deleted file mode 100644
index 399c9de..0000000
Binary files a/v1/gosseract/.samples/png/sample003.png and /dev/null differ
diff --git a/v1/gosseract/LICENSE b/v1/gosseract/LICENSE
deleted file mode 100644
index 79a64e9..0000000
--- a/v1/gosseract/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2014 otiai10
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
diff --git a/v1/gosseract/README.md b/v1/gosseract/README.md
deleted file mode 100644
index d07f5ff..0000000
--- a/v1/gosseract/README.md
+++ /dev/null
@@ -1,67 +0,0 @@
-# Gosseract-OCR [![Build Status](https://travis-ci.org/otiai10/gosseract.svg?branch=master)](https://travis-ci.org/otiai10/gosseract) [![GoDoc](https://godoc.org/github.com/otiai10/gosseract?status.png)](https://godoc.org/github.com/otiai10/gosseract)
-
-[Tesseract-OCR](https://github.com/tesseract-ocr/tesseract) command for Golang
-
-# Quick Start
-
-If you have `docker` on your machine, just hit this and try with GUI
-
-```sh
-docker run -it --rm -e PORT=8080 -p 8080:8080 otiai10/ocrserver
-```
-
-# Code Example
-
-```go
-package main
-
-import (
-	"fmt"
-	"github.com/otiai10/gosseract"
-)
-
-func main() {
-    // This is the simplest way :)
-    out := gosseract.Must(gosseract.Params{
-			Src:       "your/img/file.png",
-			Languages: "eng+heb",
-    })
-    fmt.Println(out)
-
-    // Using client
-    client, _ := gosseract.NewClient()
-    out, _ = client.Src("your/img/file.png").Out()
-    fmt.Println(out)
-}
-```
-
-# Server Application
-
-Here it is a ready-made solution.
-
-[![ocrserver](https://github.com/otiai10/ocrserver/raw/master/app/assets/favicon.png)](https://github.com/otiai10/ocrserver)
-[ocrserver](https://github.com/otiai10/ocrserver): the minimum OCR server with using gosseract.
-
-# Installation
-
-1. install [tesseract-ocr](https://github.com/tesseract-ocr/tesseract)
-2. install [go](http://golang.org/doc/install)
-3. install [gosseract](https://godoc.org/github.com/otiai10/gosseract)
-    - `go get github.com/otiai10/gosseract`
-4. install [mint for testing](https://godoc.org/github.com/otiai10/mint)
-    - `go get github.com/otiai10/mint`
-5. run the tests first↓
-
-# Test
-
-```sh
-go test ./...
-```
-
-# Dependencies
-
-- [tesseract-ocr](https://github.com/tesseract-ocr/tesseract)#3.02~
-- [mint](https://github.com/otiai10/mint) to simplize tests
-
-# Known Issues
-- https://github.com/otiai10/gosseract/issues?state=open
diff --git a/v1/gosseract/all_test.go b/v1/gosseract/all_test.go
deleted file mode 100644
index 234c185..0000000
--- a/v1/gosseract/all_test.go
+++ /dev/null
@@ -1,92 +0,0 @@
-package gosseract
-
-import (
-	"bytes"
-	"image"
-	"image/png"
-	"io/ioutil"
-	"os"
-	"strings"
-	"testing"
-
-	. "github.com/otiai10/mint"
-)
-
-func Test_Must(t *testing.T) {
-	Expect(t, Must(Params{
-		Src:       "./.samples/png/sample000.png",
-		Languages: "eng",
-	})).ToBe("01:37:58\n\n")
-}
-
-func removeWhitespace(s string) string {
-	return strings.TrimSpace(strings.Replace(s, " ", "", -1))
-}
-
-// tesseract ./.samples/png/sample000.png out -l eng ./.samples/option/digest001.txt
-func Test_Must_WithDigest(t *testing.T) {
-	params := Params{
-		Src:       "./.samples/png/sample001.png",
-		Languages: "eng",
-	}
-	Expect(t, Must(params)).ToBe("03:41:26\n\n")
-
-	// add optional digest
-	// params["digest"] = "./.samples/option/digest001.txt"
-	params.Whitelist = "24"
-	Expect(t, removeWhitespace(Must(params))).ToBe("42")
-}
-
-func Test_NewClient(t *testing.T) {
-	client, e := NewClient()
-	Expect(t, e).ToBe(nil)
-	Expect(t, client).TypeOf("*gosseract.Client")
-}
-
-func TestClient_Must(t *testing.T) {
-	client, _ := NewClient()
-	params := map[string]string{}
-	_, e := client.Must(params)
-	Expect(t, e).Not().ToBe(nil)
-}
-
-func TestClient_Src(t *testing.T) {
-	client, _ := NewClient()
-	out, e := client.Src("./.samples/png/sample000.png").Out()
-	Expect(t, e).ToBe(nil)
-	Expect(t, out).ToBe("01:37:58\n\n")
-}
-
-func TestClient_Image(t *testing.T) {
-	client, _ := NewClient()
-	img := fixImage("./.samples/png/sample000.png")
-	out, e := client.Image(img).Out()
-	Expect(t, e).ToBe(nil)
-	Expect(t, out).ToBe("01:37:58\n\n")
-}
-
-func TestClient_Digest(t *testing.T) {
-	client, _ := NewClient()
-	img := fixImage("./.samples/png/sample001.png")
-	out, e := client.Image(img).Out()
-	Expect(t, e).ToBe(nil)
-	Expect(t, out).ToBe("03:41:26\n\n")
-
-	// ./.samples/option/digest001.txt: tessedit_char_whitelist 403
-	out, e = client.Digest("./.samples/option/digest001.txt").Image(img).Out()
-	Expect(t, e).ToBe(nil)
-	Expect(t, removeWhitespace(out)).ToBe("034")
-}
-
-func fixImage(fpath string) image.Image {
-	f, _ := os.Open(fpath)
-	buf, _ := ioutil.ReadFile(f.Name())
-	img, _ := png.Decode(bytes.NewReader(buf))
-	return img
-}
-
-func TestClient_Out(t *testing.T) {
-	client, _ := NewClient()
-	_, e := client.Out()
-	Expect(t, e.Error()).ToBe("Source is not set")
-}
diff --git a/v1/gosseract/benchmark_test.go b/v1/gosseract/benchmark_test.go
deleted file mode 100644
index 5e58303..0000000
--- a/v1/gosseract/benchmark_test.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package gosseract_test
-
-import (
-	"testing"
-
-	"github.com/otiai10/gosseract/v1/gosseract"
-)
-
-func BenchmarkMust(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		gosseract.Must(gosseract.Params{
-			Src:       "./.samples/png/sample000.png",
-			Languages: "eng",
-		})
-	}
-}
diff --git a/v1/gosseract/client.go b/v1/gosseract/client.go
deleted file mode 100644
index 161b6ce..0000000
--- a/v1/gosseract/client.go
+++ /dev/null
@@ -1,117 +0,0 @@
-package gosseract
-
-import "fmt"
-import "image"
-import "os"
-import "image/png"
-
-// Client is an client to use gosseract functions
-type Client struct {
-	tesseract tesseractCmd
-	source    path
-	digest    path
-	// If the generated PNG source file needs to be deleted
-	needsdelete bool
-	Error       error
-}
-type path struct {
-	value string
-}
-
-func (p *path) Ready() bool {
-	return (p.value != "")
-}
-func (p *path) Get() string {
-	return p.value
-}
-
-// NewClient provide reference to new Client
-func NewClient() (c *Client, e error) {
-	tess, e := getTesseractCmd()
-	if e != nil {
-		return
-	}
-	c = &Client{tesseract: tess}
-	return
-}
-
-// Src accepts path to target source file
-func (c *Client) Src(srcPath string) *Client {
-	c.source = path{srcPath}
-	return c
-}
-
-// Digest accepts path to target digest file
-func (c *Client) Digest(digestPath string) *Client {
-	c.digest = path{digestPath}
-	return c
-}
-
-// Image accepts image object of target
-func (c *Client) Image(img image.Image) *Client {
-	imageFilePath, e := generateTmpFile()
-	if e != nil {
-		c.Error = e
-		return c
-	}
-	f, e := os.Create(imageFilePath)
-	// TODO: DRY
-	if e != nil {
-		c.Error = e
-		return c
-	}
-	defer f.Close()
-	png.Encode(f, img)
-	c.needsdelete = true
-	c.source = path{f.Name()}
-	return c
-}
-
-// Out executes tesseract and gives results
-func (c *Client) Out() (out string, e error) {
-	if e = c.ready(); e != nil {
-		return
-	}
-	// TODO: validation to call execute
-	out, e = c.execute()
-	if c.needsdelete {
-		os.Remove(c.source.value)
-		c.needsdelete = false
-	}
-	return
-}
-
-// Must executes tesseract directly by parameter map
-func (c *Client) Must(params map[string]string) (out string, e error) {
-	if e = c.accept(params); e != nil {
-		return
-	}
-	return c.Out()
-}
-func (c *Client) accept(params map[string]string) (e error) {
-	var ok bool
-	var src string
-	if src, ok = params["src"]; !ok {
-		return fmt.Errorf("missing parameter `src`")
-	}
-	c.source = path{src}
-	if digest, ok := params["digest"]; ok {
-		c.digest = path{digest}
-	}
-	return
-}
-func (c *Client) ready() (e error) {
-	if !c.source.Ready() {
-		return fmt.Errorf("Source is not set")
-	}
-	return
-}
-func (c *Client) execute() (res string, e error) {
-	args := []string{
-		c.source.Get(),
-	}
-	if c.digest.Ready() {
-		args = append(args, c.digest.Get())
-	}
-	return c.tesseract.Execute(args)
-}
diff --git a/v1/gosseract/example_test.go b/v1/gosseract/example_test.go
deleted file mode 100644
index bd9facc..0000000
--- a/v1/gosseract/example_test.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package gosseract_test
-
-import "github.com/otiai10/gosseract/v1/gosseract"
-
-import "fmt"
-import "image"
-
-func ExampleMust() {
-	// TODO: it panics! error handling in *Client.accept
-	out := gosseract.Must(gosseract.Params{Src: "./.samples/png/sample002.png", Languages: "eng+heb"})
-	fmt.Println(out)
-}
-
-func ExampleClient_Src() {
-	client, _ := gosseract.NewClient()
-	out, _ := client.Src("./samples/png/samples000.png").Out()
-	fmt.Println(out)
-}
-
-func ExampleClient_Image() {
-	client, _ := gosseract.NewClient()
-	var img image.Image // any your image instance
-	out, _ := client.Image(img).Out()
-	fmt.Println(out)
-}
diff --git a/v1/gosseract/goss.go b/v1/gosseract/goss.go
deleted file mode 100644
index 0e53203..0000000
--- a/v1/gosseract/goss.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package gosseract
-
-import "github.com/otiai10/gosseract/v1/gosseract/tesseract"
-
-// Params is parameters for gosseract.Must.
-type Params struct {
-	Src       string // source image file path
-	Whitelist string // tessedit_char_whitelist
-	Languages string
-}
-
-// Must execute tesseract-OCR directly by parameter map
-func Must(params Params) (out string) {
-	return tesseract.Simple(params.Src, params.Whitelist, params.Languages)
-}
diff --git a/v1/gosseract/runtime_test/all_test.sh b/v1/gosseract/runtime_test/all_test.sh
deleted file mode 100755
index 6fd7c46..0000000
--- a/v1/gosseract/runtime_test/all_test.sh
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/sh
-
-runtimes=`ls ./runtime_test/*.Dockerfile`
-
-for runtime in $runtimes; do
-  testcase=`basename ${runtime} | sed -e s/\.Dockerfile$//`
-  echo "=== ${testcase} ==="
-  docker build . -f ${runtime} -t gosseract/test:${testcase} 1>/dev/null
-  if docker run -i -t --rm gosseract/test:${testcase}; then
-    echo "--- ${testcase}: Pass ---"
-  else
-    echo "--- ${testcase}: Failed ---"
-    exit 1
-  fi
-done
diff --git a/v1/gosseract/runtime_test/tess4.00.00dev_x_go1.9.Dockerfile b/v1/gosseract/runtime_test/tess4.00.00dev_x_go1.9.Dockerfile
deleted file mode 100644
index 00a17a2..0000000
--- a/v1/gosseract/runtime_test/tess4.00.00dev_x_go1.9.Dockerfile
+++ /dev/null
@@ -1,19 +0,0 @@
-FROM otiai10/tesseract:4.00.00dev
-
-RUN apt-get update && apt-get install -y git
-
-RUN wget https://storage.googleapis.com/golang/go1.9.1.linux-amd64.tar.gz \
-  && tar -xzf go1.9.1.linux-amd64.tar.gz
-RUN mv /go /.go
-ENV GOROOT=/.go
-
-RUN mkdir /go
-ENV GOPATH=/go
-
-ENV PATH=${PATH}:${GOROOT}/bin:${GOPATH}/bin
-
-RUN go get github.com/otiai10/mint
-RUN go get github.com/otiai10/gosseract
-WORKDIR ${GOPATH}/src/github.com/otiai10/gosseract
-
-CMD go test -run Must
diff --git a/v1/gosseract/tesseract.go b/v1/gosseract/tesseract.go
deleted file mode 100644
index 1b87f78..0000000
--- a/v1/gosseract/tesseract.go
+++ /dev/null
@@ -1,84 +0,0 @@
-package gosseract
-
-import "fmt"
-import "os/exec"
-import "bytes"
-import "regexp"
-import "io/ioutil"
-
-type tesseractCmd interface {
-	Version() string
-	Execute(args []string) (string, error)
-}
-
-// TESSERACT specifies bin name for tesseract.
-const TESSERACT = "tesseract"
-const tmpFILEPREFIX = "gosseract"
-const outFILEEXTENSION = ".txt"
-
-func getTesseractCmd() (tess tesseractCmd, e error) {
-	commandPath, e := lookPath()
-	if e != nil {
-		return
-	}
-	v, e := version()
-	if e != nil {
-		return
-	}
-	if regexp.MustCompile("^3.02").Match([]byte(v)) {
-		tess = tesseract0302{version: v, commandPath: commandPath}
-		return
-	}
-	if regexp.MustCompile("^3.03").Match([]byte(v)) {
-		tess = tesseract0303{version: v, commandPath: commandPath}
-		return
-	}
-	if regexp.MustCompile("^3.04").Match([]byte(v)) {
-		tess = tesseract0304{version: v, commandPath: commandPath}
-		return
-	}
-	if regexp.MustCompile("^3.05").Match([]byte(v)) {
-		tess = tesseract0305{version: v, commandPath: commandPath}
-		return
-	}
-	e = fmt.Errorf("No tesseract version is found, supporting 3.02~, 3.03~, 3.04~ and 3.05~")
-	return
-}
-func lookPath() (commandPath string, e error) {
-	return exec.LookPath(TESSERACT)
-}
-func version() (v string, e error) {
-	v, e = execTesseractCommandWithStderr("--version")
-	if e != nil {
-		return
-	}
-	exp := regexp.MustCompile("^tesseract ([0-9\\.]+)")
-	matches := exp.FindStringSubmatch(v)
-	if len(matches) < 2 {
-		e = fmt.Errorf("tesseract version not found: response is `%s`", v)
-		return
-	}
-	v = matches[1]
-	return
-}
-func execTesseractCommandWithStderr(opt string) (res string, e error) {
-	cmd := exec.Command(TESSERACT, opt)
-	var stdout bytes.Buffer
-	cmd.Stdout = &stdout
-	var stderr bytes.Buffer
-	cmd.Stderr = &stderr
-	if e = cmd.Run(); e != nil {
-		return
-	}
-	res = stdout.String() + stderr.String()
-	return
-}
-func generateTmpFile() (fname string, e error) {
-	myTmpDir := "" // TODO: enable to choose optionally
-	f, e := ioutil.TempFile(myTmpDir, tmpFILEPREFIX)
-	if e != nil {
-		return
-	}
-	fname = f.Name()
-	return
-}
diff --git a/v1/gosseract/tesseract/tess.cpp b/v1/gosseract/tesseract/tess.cpp
deleted file mode 100644
index 7a5b1c1..0000000
--- a/v1/gosseract/tesseract/tess.cpp
+++ /dev/null
@@ -1,60 +0,0 @@
-#if __FreeBSD__ >= 10
-#include "/usr/local/include/tesseract/baseapi.h"
-#include "/usr/local/include/leptonica/allheaders.h"
-#else
-#include <tesseract/baseapi.h>
-#include <leptonica/allheaders.h>
-#endif
-
-extern "C" {
-    class TessClient {
-      private:
-        tesseract::TessBaseAPI *api;
-        Pix *image;
-      public:
-        TessClient()
-        {
-          api = new tesseract::TessBaseAPI();
-        }
-        TessClient(char *imgPath)
-        {
-          image = pixRead(imgPath);
-        }
-        void setImage(char* imgPath)
-        {
-          image = pixRead(imgPath);
-        }
-        char* Exec()
-        {
-          api->SetImage(image);
-          char *outText = api->GetUTF8Text();
-          pixDestroy(&image);
-          api->End();
-          return outText;
-        }
-    };
-
-    char* simple(char* filepath, char* whitelist ,char* languages) {
-      char *out;
-      tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
-      // Initialize tesseract-ocr with English, without specifying tessdata path
-      if (api->Init(NULL, languages)) {
-        fprintf(stderr, "Could not initialize tesseract.\n");
-        exit(1);
-      }
-
-      Pix *image = pixRead(filepath);
-      api->SetImage(image);
-
-      if (strlen(whitelist) != 0) {
-        api->SetVariable("tessedit_char_whitelist", whitelist);
-      }
-
-      out = api->GetUTF8Text();
-      api->End();
-      pixDestroy(&image);
-
-      return out;
-    }
-
-}/* extern "C" */
diff --git a/v1/gosseract/tesseract/tess.h b/v1/gosseract/tesseract/tess.h
deleted file mode 100644
index 7c76557..0000000
--- a/v1/gosseract/tesseract/tess.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-char* simple(char* filepath, char* whitelist, char* languages);
-
-#ifdef __cplusplus
-}
-#endif/* extern "C" */
diff --git a/v1/gosseract/tesseract/test/all_test.go b/v1/gosseract/tesseract/test/all_test.go
deleted file mode 100644
index dd09a61..0000000
--- a/v1/gosseract/tesseract/test/all_test.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package tesseract_test
-
-import (
-	"testing"
-
-	"github.com/otiai10/gosseract/v1/gosseract/tesseract"
-	. "github.com/otiai10/mint"
-)
-
-func TestDo(t *testing.T) {
-	Expect(t, tesseract.Simple("hoge.png", "", "eng")).ToBe("otiai10 / gosseract\n\n")
-	Expect(t, tesseract.Simple("sample.png", "", "eng")).ToBe("2,464 total\n\n")
-}
diff --git a/v1/gosseract/tesseract/test/dummy.go b/v1/gosseract/tesseract/test/dummy.go
deleted file mode 100644
index 17b8ad1..0000000
--- a/v1/gosseract/tesseract/test/dummy.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package tesseract
-
-// https://github.com/golang/go/issues/8279
diff --git a/v1/gosseract/tesseract/test/hoge.png b/v1/gosseract/tesseract/test/hoge.png
deleted file mode 100644
index bebcfe3..0000000
Binary files a/v1/gosseract/tesseract/test/hoge.png and /dev/null differ
diff --git a/v1/gosseract/tesseract/test/sample.png b/v1/gosseract/tesseract/test/sample.png
deleted file mode 100644
index 99904f2..0000000
Binary files a/v1/gosseract/tesseract/test/sample.png and /dev/null differ
diff --git a/v1/gosseract/tesseract/wrapper.go b/v1/gosseract/tesseract/wrapper.go
deleted file mode 100644
index ef544bb..0000000
--- a/v1/gosseract/tesseract/wrapper.go
+++ /dev/null
@@ -1,22 +0,0 @@
-package tesseract
-
-/*
-#if __FreeBSD__ >= 10
-#cgo LDFLAGS: -L/usr/local/lib -llept -ltesseract
-#else
-#cgo LDFLAGS: -llept -ltesseract
-#endif
-
-#include "tess.h"
-*/
-import "C"
-
-// Simple executes tesseract only with source image file path.
-func Simple(imgPath string, whitelist string, languages string) string {
-	p := C.CString(imgPath)
-	w := C.CString(whitelist)
-	l := C.CString(languages)
-
-	s := C.simple(p, w, l)
-	return C.GoString(s)
-}
diff --git a/v1/gosseract/tesseract0302.go b/v1/gosseract/tesseract0302.go
deleted file mode 100644
index c1a746f..0000000
--- a/v1/gosseract/tesseract0302.go
+++ /dev/null
@@ -1,60 +0,0 @@
-package gosseract
-
-import "fmt"
-import "os"
-import "os/exec"
-import "bytes"
-import "io/ioutil"
-
-type tesseract0302 struct {
-	version        string
-	resultFilePath string
-	commandPath    string
-}
-
-func (t tesseract0302) Version() string {
-	return t.version
-}
-func (t tesseract0302) Execute(params []string) (res string, e error) {
-
-	// command args
-	var args []string
-	// Register source file
-	args = append(args, params[0])
-	// generate result file path
-	t.resultFilePath, e = generateTmpFile()
-	if e != nil {
-		return
-	}
-	// Register result file
-	args = append(args, t.resultFilePath)
-	// Register digest file
-	if len(params) > 1 {
-		args = append(args, params[1])
-	}
-
-	// prepare command
-	cmd := exec.Command(TESSERACT, args...)
-	// execute
-	var stderr bytes.Buffer
-	cmd.Stderr = &stderr
-	if e = cmd.Run(); e != nil {
-		e = fmt.Errorf(stderr.String())
-		return
-	}
-	// read result
-	res, e = t.readResult()
-	os.Remove(t.resultFilePath)
-	return
-}
-func (t tesseract0302) readResult() (res string, e error) {
-	fpath := t.resultFilePath + outFILEEXTENSION
-	file, e := os.OpenFile(fpath, 1, 1)
-	if e != nil {
-		return
-	}
-	buffer, _ := ioutil.ReadFile(file.Name())
-	res = string(buffer)
-	os.Remove(file.Name())
-	return
-}
diff --git a/v1/gosseract/tesseract0303.go b/v1/gosseract/tesseract0303.go
deleted file mode 100644
index e95a747..0000000
--- a/v1/gosseract/tesseract0303.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package gosseract
-
-import "fmt"
-import "os"
-import "os/exec"
-import "bytes"
-import "io/ioutil"
-
-type tesseract0303 struct {
-	version        string
-	resultFilePath string
-	commandPath    string
-}
-
-func (t tesseract0303) Version() string {
-	return t.version
-}
-
-func (t tesseract0303) Execute(params []string) (res string, e error) {
-	// command args
-	var args []string
-	// Register source file
-	args = append(args, params[0])
-	// generate result file path
-	t.resultFilePath, e = generateTmpFile()
-	if e != nil {
-		return
-	}
-	// Register result file
-	args = append(args, t.resultFilePath)
-	// Register digest file
-	if len(params) > 1 {
-		args = append(args, params[1])
-	}
-
-	// prepare command
-	cmd := exec.Command(TESSERACT, args...)
-	// execute
-	var stderr bytes.Buffer
-	cmd.Stderr = &stderr
-	if e = cmd.Run(); e != nil {
-		e = fmt.Errorf(stderr.String())
-		return
-	}
-	// read result
-	res, e = t.readResult()
-	os.Remove(t.resultFilePath)
-	return
-}
-
-func (t tesseract0303) readResult() (res string, e error) {
-	fpath := t.resultFilePath + outFILEEXTENSION
-	file, e := os.OpenFile(fpath, 1, 1)
-	if e != nil {
-		return
-	}
-	buffer, _ := ioutil.ReadFile(file.Name())
-	res = string(buffer)
-	os.Remove(file.Name())
-	return
-}
diff --git a/v1/gosseract/tesseract0304.go b/v1/gosseract/tesseract0304.go
deleted file mode 100644
index 4c53f64..0000000
--- a/v1/gosseract/tesseract0304.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package gosseract
-
-import "fmt"
-import "os"
-import "os/exec"
-import "bytes"
-import "io/ioutil"
-
-type tesseract0304 struct {
-	version        string
-	resultFilePath string
-	commandPath    string
-}
-
-func (t tesseract0304) Version() string {
-	return t.version
-}
-
-func (t tesseract0304) Execute(params []string) (res string, e error) {
-	// command args
-	var args []string
-	// Register source file
-	args = append(args, params[0])
-	// generate result file path
-	t.resultFilePath, e = generateTmpFile()
-	if e != nil {
-		return
-	}
-	// Register result file
-	args = append(args, t.resultFilePath)
-	// Register digest file
-	if len(params) > 1 {
-		args = append(args, params[1])
-	}
-
-	// prepare command
-	cmd := exec.Command(TESSERACT, args...)
-	// execute
-	var stderr bytes.Buffer
-	cmd.Stderr = &stderr
-	if e = cmd.Run(); e != nil {
-		e = fmt.Errorf(stderr.String())
-		return
-	}
-	// read result
-	res, e = t.readResult()
-	os.Remove(t.resultFilePath)
-	return
-}
-
-func (t tesseract0304) readResult() (res string, e error) {
-	fpath := t.resultFilePath + outFILEEXTENSION
-	file, e := os.OpenFile(fpath, 1, 1)
-	if e != nil {
-		return
-	}
-	buffer, _ := ioutil.ReadFile(file.Name())
-	res = string(buffer)
-	os.Remove(file.Name())
-	return
-}
diff --git a/v1/gosseract/tesseract0305.go b/v1/gosseract/tesseract0305.go
deleted file mode 100644
index e741339..0000000
--- a/v1/gosseract/tesseract0305.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package gosseract
-
-import "fmt"
-import "os"
-import "os/exec"
-import "bytes"
-import "io/ioutil"
-
-type tesseract0305 struct {
-	version        string
-	resultFilePath string
-	commandPath    string
-}
-
-func (t tesseract0305) Version() string {
-	return t.version
-}
-
-func (t tesseract0305) Execute(params []string) (res string, e error) {
-	// command args
-	var args []string
-	// Register source file
-	args = append(args, params[0])
-	// generate result file path
-	t.resultFilePath, e = generateTmpFile()
-	if e != nil {
-		return
-	}
-	// Register result file
-	args = append(args, t.resultFilePath)
-	// Register digest file
-	if len(params) > 1 {
-		args = append(args, params[1])
-	}
-
-	// prepare command
-	cmd := exec.Command(TESSERACT, args...)
-	// execute
-	var stderr bytes.Buffer
-	cmd.Stderr = &stderr
-	if e = cmd.Run(); e != nil {
-		e = fmt.Errorf(stderr.String())
-		return
-	}
-	// read result
-	res, e = t.readResult()
-	os.Remove(t.resultFilePath)
-	return
-}
-
-func (t tesseract0305) readResult() (res string, e error) {
-	fpath := t.resultFilePath + outFILEEXTENSION
-	file, e := os.OpenFile(fpath, 1, 1)
-	if e != nil {
-		return
-	}
-	buffer, _ := ioutil.ReadFile(file.Name())
-	res = string(buffer)
-	os.Remove(file.Name())
-	return
-}