diff --git a/options/options.go b/options/options.go
index 5e08541..44cfda5 100644
--- a/options/options.go
+++ b/options/options.go
@@ -11,14 +11,15 @@ import (
 
 // Options holds the configuration for a service instance
 type Options struct {
-	Name       string
-	ListenAddr string
-	Logger     logger.Logger
-	Codec      codec.Codec
-	Transport  transport.Transport
-	Router     router.Router
-	Broker     broker.Broker
-	Config     config.Config
+	Name    string
+	RPCPort int16
+
+	Logger    logger.Logger
+	Codec     codec.Codec
+	Transport transport.Transport
+	Router    router.Router
+	Broker    broker.Broker
+	Config    config.Config
 }
 
 // Option represents a function that can be used to mutate an Options object
@@ -31,10 +32,10 @@ func Name(name string) Option {
 	}
 }
 
-// ListenAddr sets the address in which the gRPC server will listen on
-func ListenAddr(addr string) Option {
+// RPCPort sets the port in which this service's RPC will listen on, as well as the port in which other services' RPC servers are listening on
+func RPCPort(port int16) Option {
 	return func(o *Options) {
-		o.ListenAddr = addr
+		o.RPCPort = port
 	}
 }
 
diff --git a/server/server.go b/server/server.go
index 3583aca..e510ffa 100644
--- a/server/server.go
+++ b/server/server.go
@@ -33,7 +33,7 @@ func NewServer(opts *options.Options) Server {
 func (s *server) Start() error {
 	ctx := context.Background()
 
-	l, err := s.opts.Transport.Listen(ctx, s.opts.ListenAddr)
+	l, err := s.opts.Transport.Listen(ctx, fmt.Sprintf(":%d", s.opts.RPCPort))
 	if err != nil {
 		return err
 	}
diff --git a/service.go b/service.go
index f10bdf6..77330f3 100644
--- a/service.go
+++ b/service.go
@@ -36,6 +36,7 @@ type service struct {
 func NewService(opts ...options.Option) Service {
 	svc := &service{}
 	svc.options.Logger = logger.NewStdoutLogger()
+	svc.options.RPCPort = 7070
 
 	svc.Apply(opts...)
 
@@ -73,9 +74,6 @@ func (s *service) Start() error {
 	if s.options.Name == "" {
 		return errors.New("missing service name")
 	}
-	if s.options.ListenAddr == "" {
-		return errors.New("missing listen address")
-	}
 
 	if s.options.Broker != nil {
 		if err := s.options.Broker.Connect(context.Background()); err != nil {