diff --git a/lib/cli.js b/lib/cli.js
index b75eee04..18c256f6 100644
--- a/lib/cli.js
+++ b/lib/cli.js
@@ -94,7 +94,8 @@ program
         , '--provider', options.name
         , '--connect-sub', options.connectSub.join(',')
         , '--connect-push', options.connectPush.join(',')
-        , '--ports', ports.join(',')
+        , '--screen-port', ports.shift()
+        , '--connect-port', ports.shift()
         , '--public-ip', options.publicIp
         , '--group-timeout', options.groupTimeout
         , '--storage-url', options.storageUrl
@@ -126,9 +127,12 @@ program
   .option('-p, --connect-push <endpoint>'
     , 'push endpoint'
     , cliutil.list)
-  .option('--ports <ports>'
-    , 'ports allocated to worker'
-    , cliutil.list)
+  .option('--screen-port <port>'
+    , 'port allocated to the screen websocket'
+    , Number)
+  .option('--connect-port <port>'
+    , 'port allocated to adb connect'
+    , Number)
   .option('--public-ip <ip>'
     , 'public ip for global access'
     , String
@@ -164,8 +168,11 @@ program
     if (!options.provider) {
       this.missingArgument('--provider')
     }
-    if (!options.ports) {
-      this.missingArgument('--ports')
+    if (!options.screenPort) {
+      this.missingArgument('--screen-port')
+    }
+    if (!options.connectPort) {
+      this.missingArgument('--connect-port')
     }
     if (!options.storageUrl) {
       this.missingArgument('--storage-url')
@@ -174,7 +181,6 @@ program
     require('./units/device')({
       serial: serial
     , provider: options.provider
-    , ports: options.ports
     , publicIp: options.publicIp
     , endpoints: {
         sub: options.connectSub
@@ -186,6 +192,8 @@ program
     , adbPort: options.adbPort
     , disableScreenPublicProxy: !!options.disableScreenPublicProxy
     , screenWsUrlPattern: options.screenWsUrlPattern
+    , screenPort: options.screenPort
+    , connectPort: options.connectPort
     })
   })
 
diff --git a/lib/units/device/plugins/connect.js b/lib/units/device/plugins/connect.js
index 8e20936b..0142ccf6 100644
--- a/lib/units/device/plugins/connect.js
+++ b/lib/units/device/plugins/connect.js
@@ -20,7 +20,7 @@ module.exports = syrup.serial()
       , plugin = Object.create(null)
       , activeServer = null
 
-    plugin.port = options.ports.pop()
+    plugin.port = options.connectPort
     plugin.url = util.format('%s:%s', options.publicIp, plugin.port)
 
     plugin.start = function() {
diff --git a/lib/units/device/plugins/screen/options.js b/lib/units/device/plugins/screen/options.js
index fcdcff30..9a2f6883 100644
--- a/lib/units/device/plugins/screen/options.js
+++ b/lib/units/device/plugins/screen/options.js
@@ -6,7 +6,7 @@ module.exports = syrup.serial()
     var plugin = Object.create(null)
 
     plugin.devicePort = 9002
-    plugin.publicPort = options.ports.pop()
+    plugin.publicPort = options.screenPort
     plugin.publicUrl = _.template(options.screenWsUrlPattern)({
       publicIp: options.publicIp
     , publicPort: plugin.publicPort
diff --git a/lib/units/provider/index.js b/lib/units/provider/index.js
index daed1754..f8db0dda 100644
--- a/lib/units/provider/index.js
+++ b/lib/units/provider/index.js
@@ -32,7 +32,7 @@ module.exports = function(options) {
   // port, we must ensure that we allocate ports in fixed groups.
   var ports = options.ports.slice(
     0
-  , options.ports.length - options.ports.length % 4
+  , options.ports.length - options.ports.length % 2
   )
 
   // Information about total devices
@@ -303,7 +303,7 @@ module.exports = function(options) {
 
       // Spawn a device worker
       function spawn() {
-        var allocatedPorts = ports.splice(0, 4)
+        var allocatedPorts = ports.splice(0, 2)
           , proc = options.fork(device, allocatedPorts)
           , resolver = Promise.defer()