diff --git a/client.go b/client.go
index b0a97804..5266fede 100644
--- a/client.go
+++ b/client.go
@@ -218,10 +218,16 @@ func NewVersionedClient(endpoint string, apiVersionString string) (*Client, erro
 		eventMonitor:        new(eventMonitoringState),
 		requestedAPIVersion: requestedAPIVersion,
 	}
-	c.initializeNativeClient()
+	c.initializeNativeClient(defaultTransport)
 	return c, nil
 }
 
+// WithTransport replaces underlying HTTP client of Docker Client by accepting
+// a function that returns pointer to a transport object.
+func (c *Client) WithTransport(trFunc func () *http.Transport) {
+	c.initializeNativeClient(trFunc)
+}
+
 // NewVersionnedTLSClient has been DEPRECATED, please use NewVersionedTLSClient.
 func NewVersionnedTLSClient(endpoint string, cert, key, ca, apiVersionString string) (*Client, error) {
 	return NewVersionedTLSClient(endpoint, cert, key, ca, apiVersionString)
@@ -339,7 +345,7 @@ func NewVersionedTLSClientFromBytes(endpoint string, certPEMBlock, keyPEMBlock,
 		eventMonitor:        new(eventMonitoringState),
 		requestedAPIVersion: requestedAPIVersion,
 	}
-	c.initializeNativeClient()
+	c.initializeNativeClient(defaultTransport)
 	return c, nil
 }
 
diff --git a/client_unix.go b/client_unix.go
index ab73cf2b..b1dfe115 100644
--- a/client_unix.go
+++ b/client_unix.go
@@ -9,21 +9,24 @@ package docker
 import (
 	"context"
 	"net"
+	"net/http"
 )
 
 // initializeNativeClient initializes the native Unix domain socket client on
 // Unix-style operating systems
-func (c *Client) initializeNativeClient() {
+func (c *Client) initializeNativeClient(trFunc func () *http.Transport) {
 	if c.endpointURL.Scheme != unixProtocol {
 		return
 	}
-	socketPath := c.endpointURL.Path
-	tr := defaultTransport()
+	sockPath := c.endpointURL.Path
+
+	tr := trFunc()
+
 	tr.Dial = func(network, addr string) (net.Conn, error) {
-		return c.Dialer.Dial(unixProtocol, socketPath)
+		return c.Dialer.Dial(unixProtocol, sockPath)
 	}
 	tr.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
-		return c.Dialer.Dial(unixProtocol, socketPath)
+		return c.Dialer.Dial(unixProtocol, sockPath)
 	}
 	c.HTTPClient.Transport = tr
 }
diff --git a/client_windows.go b/client_windows.go
index c9ecc187..c2dda464 100644
--- a/client_windows.go
+++ b/client_windows.go
@@ -10,6 +10,7 @@ import (
 	"context"
 	"net"
 	"time"
+	"net/http"
 
 	"github.com/Microsoft/go-winio"
 )
@@ -25,7 +26,7 @@ func (p pipeDialer) Dial(network, address string) (net.Conn, error) {
 }
 
 // initializeNativeClient initializes the native Named Pipe client for Windows
-func (c *Client) initializeNativeClient() {
+func (c *Client) initializeNativeClient(trFunc func () *http.Transport) {
 	if c.endpointURL.Scheme != namedPipeProtocol {
 		return
 	}
@@ -34,7 +35,7 @@ func (c *Client) initializeNativeClient() {
 		timeout := namedPipeConnectTimeout
 		return winio.DialPipe(namedPipePath, &timeout)
 	}
-	tr := defaultTransport()
+	tr := trFunc()
 	tr.Dial = dialFunc
 	tr.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
 		return dialFunc(network, addr)