diff --git a/option/smart_dialer.go b/option/smart_dialer.go
new file mode 100644
index 00000000..59d797fd
--- /dev/null
+++ b/option/smart_dialer.go
@@ -0,0 +1,51 @@
+package option
+
+// SmartDialerOutboundOptions set the outbound options used by the outline-sdk
+// smart dialer. You can find more details about the parameters by looking
+// through the implementation: https://github.com/Jigsaw-Code/outline-sdk/blob/v0.0.18/x/smart/stream_dialer.go#L65-L100
+// Or check the documentation README: https://github.com/Jigsaw-Code/outline-sdk/tree/v0.0.18/x/smart
+type SmartDialerOutboundOptions struct {
+	DialerOptions
+	DNSResolvers []DNSEntryConfig `json:"dns,omitempty"`
+	TLS          []string         `json:"tls,omitempty"`
+}
+
+// DNSEntryConfig specifies a list of resolvers to test and they can be one of
+// the attributes (system, https, tls, udp or tcp)
+type DNSEntryConfig struct {
+	// System is used for using the system as a resolver, if you want to use it
+	// provide an empty object.
+	System *struct{} `json:"system,omitempty"`
+	// HTTPS use an encrypted DNS over HTTPS (DoH) resolver.
+	HTTPS *HTTPSEntryConfig `json:"https,omitempty"`
+	// TLS use an encrypted DNS over TLS (DoT) resolver.
+	TLS *TLSEntryConfig `json:"tls,omitempty"`
+	// UDP use a UDP resolver
+	UDP *UDPEntryConfig `json:"udp,omitempty"`
+	// TCP use a TCP resolver
+	TCP *TCPEntryConfig `json:"tcp,omitempty"`
+}
+
+type HTTPSEntryConfig struct {
+	// Domain name of the host.
+	Name string `json:"name,omitempty"`
+	// Host:port. Defaults to Name:443.
+	Address string `json:"address,omitempty"`
+}
+
+type TLSEntryConfig struct {
+	// Domain name of the host.
+	Name string `json:"name,omitempty"`
+	// Host:port. Defaults to Name:853.
+	Address string `json:"address,omitempty"`
+}
+
+type UDPEntryConfig struct {
+	// Host:port.
+	Address string `json:"address,omitempty"`
+}
+
+type TCPEntryConfig struct {
+	// Host:port.
+	Address string `json:"address,omitempty"`
+}