diff --git a/.gitignore b/.gitignore
index 0b9f9b8..3d443ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 .idea/
 _vendor/
+vendor/
+coverage.out
+Gopkg.lock
diff --git a/.travis.yml b/.travis.yml
index f0d2dc9..8e4ac05 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,29 +3,25 @@ notifications:
   email: false
 language: go
 go:
-  - 1.8
-  - 1.9
-  - "1.10"
+  - '1.9'
+  - '1.10'
+  - '1.11'
 
 services:
   - docker
 
 before_install:
   - travis_retry docker pull yandex/clickhouse-server
-  - docker run -d -p 127.0.0.1:8123:8123 --name dbr-clickhouse-server yandex/clickhouse-server
+  - make up_docker_server
+  - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
 
 install:
-  - travis_retry go get -u github.com/golang/lint/golint
-  - travis_retry go get github.com/mattn/goveralls
-  - travis_retry go get golang.org/x/tools/cmd/cover
-  - travis_retry go get github.com/stretchr/testify
+  - make init
+  - travis_retry go get -v github.com/mattn/goveralls/...
 
 before_script:
   - export TEST_CLICKHOUSE_DSN="http://localhost:8123/default"
 
 script:
-  - test -z "$(golint ./... | tee /dev/stderr)"
-  - go vet ./...
-  - test -z "$(gofmt -d -s . | tee /dev/stderr)"
-  - go test -v -covermode=count -coverprofile=coverage.out .
+  - make test
   - goveralls -coverprofile=coverage.out -service=travis-ci
diff --git a/Gopkg.toml b/Gopkg.toml
new file mode 100644
index 0000000..1e3d2c5
--- /dev/null
+++ b/Gopkg.toml
@@ -0,0 +1,14 @@
+# for tests
+required = ["github.com/golang/lint/golint"]
+
+[[override]]
+  name = "golang.org/x/tools"
+  revision = "a019f6b7c5bfcffdf421924fc0ddb74b867a53f2"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.2.2"
+
+[prune]
+  go-tests = true
+  unused-packages = true
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e6b3ab9
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,18 @@
+SHELL := /bin/bash
+
+init:
+	dep ensure -v
+	go install ./vendor/...
+
+up_docker_server: stop_docker_server
+	docker run --rm=true -p 127.0.0.1:8123:8123 --name dbr-clickhouse-server -d yandex/clickhouse-server;
+
+stop_docker_server:
+	test -n "$$(docker ps --format {{.Names}} | grep dbr-clickhouse-server)" && docker stop dbr-clickhouse-server || true
+
+test: up_docker_server
+	test -z "$$(golint ./... | grep -v vendor | tee /dev/stderr)"
+	go vet -v ./...
+	test -z "$$(gofmt -d -s $$(find . -name \*.go -print | grep -v vendor) | tee /dev/stderr)"
+	go test -v -covermode=count -coverprofile=coverage.out . 
+	$(MAKE) stop_docker_server
\ No newline at end of file
diff --git a/README.md b/README.md
index dabe37e..c324ed3 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,18 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	stmt, err := tx.Prepare("INSERT INTO example (country_code, os_id, browser_id, categories, action_day, action_time) VALUES (?, ?, ?, ?, ?, ?)")
+	stmt, err := tx.Prepare(`
+		INSERT INTO example (
+			country_code,
+			os_id,
+			browser_id,
+			categories,
+			action_day,
+			action_time
+		) VALUES (
+			?, ?, ?, ?, ?, ?
+		)`)
+
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -108,7 +119,17 @@ func main() {
 		log.Fatal(err)
 	}
 
-	rows, err := connect.Query("SELECT country_code, os_id, browser_id, categories, action_day, action_time FROM example")
+	rows, err := connect.Query(`
+		SELECT 
+			country_code,
+			os_id,
+			browser_id,
+			categories,
+			action_day,
+			action_time
+		FROM
+			example`)
+
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -120,10 +141,19 @@ func main() {
 			categories            []int16
 			actionDay, actionTime time.Time
 		)
-		if err := rows.Scan(&country, &os, &browser, &categories, &actionDay, &actionTime); err != nil {
+		if err := rows.Scan(
+			&country,
+			&os,
+			&browser,
+			&categories,
+			&actionDay,
+			&actionTime,
+		); err != nil {
 			log.Fatal(err)
 		}
-		log.Printf("country: %s, os: %d, browser: %d, categories: %v, action_day: %s, action_time: %s", country, os, browser, categories, actionDay, actionTime)
+		log.Printf("country: %s, os: %d, browser: %d, categories: %v, action_day: %s, action_time: %s",
+			country, os, browser, categories, actionDay, actionTime,
+		)
 	}
 }
 ```
@@ -161,7 +191,23 @@ func main() {
 	}
 
 	for _, item := range items {
-		log.Printf("country: %s, os: %d, browser: %d, categories: %v, action_time: %s", item.CountryCode, item.OsID, item.BrowserID, item.Categories, item.ActionTime)
+		log.Printf("country: %s, os: %d, browser: %d, categories: %v, action_time: %s",
+			item.CountryCode, item.OsID, item.BrowserID, item.Categories, item.ActionTime,
+		)
 	}
 }
 ```
+
+## Go versions
+Officially support last 3 golang releases
+
+
+## Development
+You can check the effect of changes on Travis CI or run tests locally:
+
+``` bash
+make init # dep ensure and install
+make test
+```
+
+_Remember that `make init` will add a few binaries used for testing (like `golint` and it's dependencies) into your GOPATH_
diff --git a/config.go b/config.go
index ffc888e..28e5976 100644
--- a/config.go
+++ b/config.go
@@ -110,8 +110,7 @@ func ParseDSN(dsn string) (*Config, error) {
 	}
 	cfg := NewConfig()
 
-	cfg.Scheme = u.Scheme
-	cfg.Host = u.Host
+	cfg.Scheme, cfg.Host = u.Scheme, u.Host
 	if len(u.Path) > 1 {
 		// skip '/'
 		cfg.Database = u.Path[1:]
diff --git a/helpers.go b/helpers.go
index d967fcc..c8b664c 100644
--- a/helpers.go
+++ b/helpers.go
@@ -42,7 +42,7 @@ func formatDate(value time.Time) string {
 
 func readResponse(response *http.Response) (result []byte, err error) {
 	if response.ContentLength > 0 {
-		result = make([]byte, response.ContentLength)
+		result = make([]byte, 0, response.ContentLength)
 	}
 	buf := bytes.NewBuffer(result)
 	defer response.Body.Close()
@@ -52,7 +52,7 @@ func readResponse(response *http.Response) (result []byte, err error) {
 }
 
 func numOfColumns(data []byte) int {
-	cnt := 0
+	var cnt int
 	for _, ch := range data {
 		switch ch {
 		case '\t':
@@ -66,8 +66,7 @@ func numOfColumns(data []byte) int {
 
 // splitTSV splits one row of tab separated values, returns begin of next row
 func splitTSV(data []byte, out []string) int {
-	i := 0
-	k := 0
+	var i, k int
 	for j, ch := range data {
 		switch ch {
 		case '\t':