diff --git a/Makefile b/Makefile
index 92a994c..51ebf17 100644
--- a/Makefile
+++ b/Makefile
@@ -5,10 +5,10 @@ SOURCE_PATH = /gopath/src/github.com/buger/gor/
 release: release-x86 release-x64
 
 release-x64:
-	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64 --env CGO_ENABLED=0 -i gor go build && tar -czf gor_x64.tar.gz gor && rm gor
+	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64 --env CGO_ENABLED=0 -i gor go build -ldflags "-X main.VERSION $(VERSION)"&& tar -czf gor_$(VERSION)_x64.tar.gz gor && rm gor
 
 release-x86:
-	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=386 --env CGO_ENABLED=0 -i gor go build && tar -czf gor_x86.tar.gz gor && rm gor
+	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=386 --env CGO_ENABLED=0 -i gor go build -ldflags "-X main.VERSION $(VERSION)" && tar -czf gor_$(VERSION)_x86.tar.gz gor && rm gor
 
 dbuild:
 	docker build -t gor .
diff --git a/README.md b/README.md
index b544ee2..2ea19c3 100644
--- a/README.md
+++ b/README.md
@@ -172,6 +172,11 @@ gor --input-raw :80 --output-http "http://staging.server" \
     --http-header "Enable-Feature-X: true"
 ```
 
+#### Host header
+Host header gets special treatment. By default Host get set to the value specified in --output-http. If you manually set --http-header "Host: anonther.com", Gor will not override Host value.
+
+If you app accepts traffic from multiple domain, and you want to keep original headers, there is specific `--http-original-host` with tells Gor do not touch Host header at all.
+
 ### Saving requests to file and replaying them
 You can save requests to file, and replay them later:
 ```
diff --git a/http_client.go b/http_client.go
index dc993d4..6a8632c 100644
--- a/http_client.go
+++ b/http_client.go
@@ -42,7 +42,9 @@ func NewHTTPClient(baseURL string, config *HTTPClientConfig) *HTTPClient {
 
 	u, _ := url.Parse(baseURL)
 	if !strings.Contains(u.Host, ":") {
-		u.Host += ":" + defaultPorts[u.Scheme]
+		if u.Scheme != "http" {
+			u.Host += ":" + defaultPorts[u.Scheme]
+		}
 	}
 
 	if config.Timeout.Nanoseconds() == 0 {
@@ -66,7 +68,11 @@ func NewHTTPClient(baseURL string, config *HTTPClientConfig) *HTTPClient {
 func (c *HTTPClient) Connect() (err error) {
 	c.Disconnect()
 
-	c.conn, err = net.Dial("tcp", c.host)
+	if !strings.Contains(c.host, ":") {
+		c.conn, err = net.Dial("tcp", c.host + ":80")
+	} else {
+		c.conn, err = net.Dial("tcp", c.host)
+	}
 
 	if c.scheme == "https" {
 		tlsConn := tls.Client(c.conn, &tls.Config{InsecureSkipVerify: true})
diff --git a/http_client_test.go b/http_client_test.go
index d14d5be..6109a90 100644
--- a/http_client_test.go
+++ b/http_client_test.go
@@ -15,8 +15,8 @@ import (
 
 func TestHTTPClientURLPort(t *testing.T) {
 	c1 := NewHTTPClient("http://example.com", &HTTPClientConfig{})
-	if c1.baseURL != "http://example.com:80" {
-		t.Error("Sould add 80 port for http:", c1.baseURL)
+	if c1.baseURL != "http://example.com" {
+		t.Error("Sould not add 80 port for http:", c1.baseURL)
 	}
 
 	c2 := NewHTTPClient("https://example.com", &HTTPClientConfig{})
@@ -30,8 +30,8 @@ func TestHTTPClientURLPort(t *testing.T) {
 	}
 
 	c4 := NewHTTPClient("example.com", &HTTPClientConfig{})
-	if c4.baseURL != "http://example.com:80" {
-		t.Error("Sould add default protocol:", c4.baseURL)
+	if c4.baseURL != "http://example.com" {
+		t.Error("Sould not add default protocol:", c4.baseURL)
 	}
 }
 
diff --git a/input_tcp_test.go b/input_tcp_test.go
index bbb0cc7..f440c57 100644
--- a/input_tcp_test.go
+++ b/input_tcp_test.go
@@ -40,7 +40,7 @@ func TestTCPInput(t *testing.T) {
 	for i := 0; i < 100; i++ {
 		wg.Add(1)
 
-		encoded := make([]byte, len(msg)*2+1)
+		encoded := make([]byte, len(msg)*2)
 		hex.Encode(encoded, msg)
 		conn.Write(append(encoded, '\n'))
 	}
diff --git a/settings.go b/settings.go
index 3b1c71b..528adcd 100644
--- a/settings.go
+++ b/settings.go
@@ -7,10 +7,7 @@ import (
 	"os"
 )
 
-const (
-	// VERSION specifies Gor current version
-	VERSION = "0.9.8"
-)
+var VERSION string
 
 // MultiOption allows to specify multiple flags with same name and collects all values into array
 type MultiOption []string
@@ -94,6 +91,7 @@ func init() {
 	flag.DurationVar(&Settings.outputHTTPConfig.Timeout, "output-http-timeout", 0, "Specify HTTP request/response timeout. By default 5s. Example: --output-http-timeout 30s")
 
 	flag.BoolVar(&Settings.outputHTTPConfig.stats, "output-http-stats", false, "Report http output queue stats to console every 5 seconds.")
+	flag.BoolVar(&Settings.outputHTTPConfig.OriginalHost, "http-original-host", false, "Normally gor replaces the Host http header with the host supplied with --output-http.  This option disables that behavior, preserving the original Host header.")
 
 	flag.StringVar(&Settings.outputHTTPConfig.elasticSearch, "output-http-elasticsearch", "", "Send request and response stats to ElasticSearch:\n\tgor --input-raw :8080 --output-http staging.com --output-http-elasticsearch 'es_host:api_port/index_name'")