diff --git a/index.js b/index.js
index 0242a43..7ffdafe 100644
--- a/index.js
+++ b/index.js
@@ -2,5 +2,7 @@
 
 module.exports = {
   series: require('./lib/series'),
-  parallel: require('./lib/parallel')
+  parallel: require('./lib/parallel'),
+  settleSeries: require('./lib/settleSeries'),
+  settleParallel: require('./lib/settleParallel')
 };
diff --git a/lib/createParallel.js b/lib/createParallel.js
deleted file mode 100644
index 1efa7ce..0000000
--- a/lib/createParallel.js
+++ /dev/null
@@ -1,22 +0,0 @@
-'use strict';
-
-var _ = require('lodash');
-var async = require('async');
-var verifyArguments = require('./verifyArguments');
-
-function createParallel(mapFn){
-
-  function buildParallel(){
-    var args = verifyArguments(_.flatten(arguments));
-
-    function parallel(done){
-      async.map(args, mapFn, done);
-    }
-
-    return parallel;
-  }
-
-  return buildParallel;
-}
-
-module.exports = createParallel;
diff --git a/lib/createSeries.js b/lib/createSeries.js
deleted file mode 100644
index 345c17d..0000000
--- a/lib/createSeries.js
+++ /dev/null
@@ -1,22 +0,0 @@
-'use strict';
-
-var _ = require('lodash');
-var async = require('async');
-var verifyArguments = require('./verifyArguments');
-
-function createSeries(mapFn){
-
-  function buildSeries(){
-    var args = verifyArguments(_.flatten(arguments));
-
-    function series(done){
-      async.mapSeries(args, mapFn, done);
-    }
-
-    return series;
-  }
-
-  return buildSeries;
-}
-
-module.exports = createSeries;
diff --git a/lib/getExtensions.js b/lib/getExtensions.js
new file mode 100644
index 0000000..022586b
--- /dev/null
+++ b/lib/getExtensions.js
@@ -0,0 +1,11 @@
+'use strict';
+
+function getExtensions(lastArg){
+  if(typeof lastArg !== 'function'){
+    return lastArg;
+  }
+
+  return {};
+}
+
+module.exports = getExtensions;
diff --git a/lib/parallel.js b/lib/parallel.js
index 9d316a8..e35d1c3 100644
--- a/lib/parallel.js
+++ b/lib/parallel.js
@@ -4,15 +4,13 @@ var _ = require('lodash');
 var asyncDone = require('async-done');
 var nowAndLater = require('now-and-later');
 
+var getExtensions = require('./getExtensions');
 var verifyArguments = require('./verifyArguments');
 
 function buildParallel(){
   var args = verifyArguments(arguments);
 
-  var extensions = {};
-  if(typeof _.last(args) !== 'function'){
-    extensions = _.last(args);
-  }
+  var extensions = getExtensions(_.last(args));
 
   function parallel(done){
     nowAndLater.parallel(args, asyncDone, extensions, done);
diff --git a/lib/series.js b/lib/series.js
index f0ab8eb..023938b 100644
--- a/lib/series.js
+++ b/lib/series.js
@@ -4,15 +4,13 @@ var _ = require('lodash');
 var asyncDone = require('async-done');
 var nowAndLater = require('now-and-later');
 
+var getExtensions = require('./getExtensions');
 var verifyArguments = require('./verifyArguments');
 
 function buildSeries(){
   var args = verifyArguments(arguments);
 
-  var extensions = {};
-  if(typeof _.last(args) !== 'function'){
-    extensions = _.last(args);
-  }
+  var extensions = getExtensions(_.last(args));
 
   function series(done){
     nowAndLater.series(args, asyncDone, extensions, done);
diff --git a/lib/settleParallel.js b/lib/settleParallel.js
new file mode 100644
index 0000000..7d9a42a
--- /dev/null
+++ b/lib/settleParallel.js
@@ -0,0 +1,23 @@
+'use strict';
+
+var _ = require('lodash');
+var asyncSettle = require('async-settle');
+var nowAndLater = require('now-and-later');
+
+var onSettled = require('./onSettled');
+var getExtensions = require('./getExtensions');
+var verifyArguments = require('./verifyArguments');
+
+function buildParallel(){
+  var args = verifyArguments(arguments);
+
+  var extensions = getExtensions(_.last(args));
+
+  function settleParallel(done){
+    nowAndLater.parallel(args, asyncSettle, extensions, onSettled(done));
+  }
+
+  return settleParallel;
+}
+
+module.exports = buildParallel;
diff --git a/lib/settleSeries.js b/lib/settleSeries.js
new file mode 100644
index 0000000..746830d
--- /dev/null
+++ b/lib/settleSeries.js
@@ -0,0 +1,23 @@
+'use strict';
+
+var _ = require('lodash');
+var asyncSettle = require('async-settle');
+var nowAndLater = require('now-and-later');
+
+var onSettled = require('./onSettled');
+var getExtensions = require('./getExtensions');
+var verifyArguments = require('./verifyArguments');
+
+function buildSeries(){
+  var args = verifyArguments(arguments);
+
+  var extensions = getExtensions(_.last(args));
+
+  function settleSeries(done){
+    nowAndLater.series(args, asyncSettle, extensions, onSettled(done));
+  }
+
+  return settleSeries;
+}
+
+module.exports = buildSeries;
diff --git a/settle.js b/settle.js
deleted file mode 100644
index b0f0aa5..0000000
--- a/settle.js
+++ /dev/null
@@ -1,9 +0,0 @@
-'use strict';
-
-var series = require('./settle/series');
-var parallel = require('./settle/parallel');
-
-module.exports = {
-  series: series,
-  parallel: parallel
-};
diff --git a/settle/parallel.js b/settle/parallel.js
deleted file mode 100644
index c2e0a6b..0000000
--- a/settle/parallel.js
+++ /dev/null
@@ -1,19 +0,0 @@
-'use strict';
-
-var _ = require('lodash');
-var async = require('async');
-var asyncSettle = require('async-settle');
-
-var onSettled = require('../lib/onSettled');
-
-function buildParallel(){
-  var args = _.flatten(arguments);
-
-  function settleParallel(done){
-    async.map(args, asyncSettle, onSettled(done));
-  }
-
-  return settleParallel;
-}
-
-module.exports = buildParallel;
diff --git a/settle/series.js b/settle/series.js
deleted file mode 100644
index abe2d89..0000000
--- a/settle/series.js
+++ /dev/null
@@ -1,19 +0,0 @@
-'use strict';
-
-var _ = require('lodash');
-var async = require('async');
-var asyncSettle = require('async-settle');
-
-var onSettled = require('../lib/onSettled');
-
-function buildSeries(){
-  var args = _.flatten(arguments);
-
-  function settleSeries(done){
-    async.mapSeries(args, asyncSettle, onSettled(done));
-  }
-
-  return settleSeries;
-}
-
-module.exports = buildSeries;
diff --git a/test/settleParallel.js b/test/settleParallel.js
index 8881b95..1d471b4 100644
--- a/test/settleParallel.js
+++ b/test/settleParallel.js
@@ -2,7 +2,7 @@
 
 var test = require('tap').test;
 
-var bach = require('../settle');
+var bach = require('../');
 
 function fn1(done){
   done(null, 1);
@@ -23,7 +23,7 @@ function fnError(done){
 }
 
 test('should execute functions in parallel and call callback with results on settled', function(t){
-  bach.parallel(fn1, fn2, fn3)(function(errors, results){
+  bach.settleParallel(fn1, fn2, fn3)(function(errors, results){
     t.notOk(errors, 'errors should be undefined');
     t.ok(results, 'results should be defined');
     t.deepEqual(results, [1, 2, 3], 'results should be [1, 2, 3]');
@@ -38,7 +38,7 @@ test('should execute functions in parallel and call callback with errors on sett
       done(null, 2);
     }, 500);
   }
-  bach.parallel(fn1, slowFn, fn3, fnError)(function(errors, results){
+  bach.settleParallel(fn1, slowFn, fn3, fnError)(function(errors, results){
     t.ok(errors, 'errors should be defined');
     t.ok(results, 'results should be defined');
     t.ok(Array.isArray(errors), 'errors should be an array');
diff --git a/test/settleSeries.js b/test/settleSeries.js
index 539248c..54fc6a1 100644
--- a/test/settleSeries.js
+++ b/test/settleSeries.js
@@ -2,7 +2,7 @@
 
 var test = require('tap').test;
 
-var bach = require('../settle');
+var bach = require('../');
 
 function fn1(done){
   done(null, 1);
@@ -23,7 +23,7 @@ function fnError(done){
 }
 
 test('should execute functions in series and call callback with results on settled', function(t){
-  bach.series(fn1, fn2, fn3)(function(errors, results){
+  bach.settleSeries(fn1, fn2, fn3)(function(errors, results){
     t.notOk(errors, 'errors should be undefined');
     t.ok(results, 'results should be defined');
     t.deepEqual(results, [1, 2, 3], 'results should be [1, 2, 3]');
@@ -38,7 +38,7 @@ test('should execute functions in series and call callback with errors on settle
       done(null, 2);
     }, 500);
   }
-  bach.series(fn1, slowFn, fn3, fnError)(function(errors, results){
+  bach.settleSeries(fn1, slowFn, fn3, fnError)(function(errors, results){
     t.ok(errors, 'errors should be defined');
     t.ok(results, 'results should be defined');
     t.ok(Array.isArray(errors), 'errors should be an array');