diff --git a/lib/ncp.js b/lib/ncp.js
index 9b8ccf7..bc25a05 100644
--- a/lib/ncp.js
+++ b/lib/ncp.js
@@ -1,5 +1,6 @@
 var fs = require('fs'),
-    path = require('path');
+    path = require('path'),
+    util = require('util');
 
 const modern = /^v0\.1\d\.\d+/.test(process.version);
 
@@ -21,6 +22,7 @@ function ncp (source, dest, options, callback) {
       rename = options.rename,
       transform = options.transform,
       clobber = options.clobber !== false,
+      modified = options.modified,
       dereference = options.dereference,
       errs = null,
       eventName = modern ? 'finish' : 'close',
@@ -68,6 +70,8 @@ function ncp (source, dest, options, callback) {
       // We need to get the mode from the stats object and preserve it.
       item.name = source;
       item.mode = stats.mode;
+      item.mtime = stats.mtime; //modified time
+      item.atime = stats.atime; //access time
 
       if (stats.isDirectory()) {
         return onDir(item);
@@ -95,7 +99,17 @@ function ncp (source, dest, options, callback) {
         rmFile(target, function () {
           copyFile(file, target);
         });
-      } else {
+      }
+      if (modified) {
+        var stat = dereference ? fs.stat : fs.lstat;
+        stat(target, function(err, stats) {
+            //if souce modified time greater to target modified time copy file
+            if (file.mtime.getTime()>stats.mtime.getTime())
+                copyFile(file, target);
+            else return cb();
+        });
+      }
+      else {
         return cb();
       }
     });
@@ -115,7 +129,14 @@ function ncp (source, dest, options, callback) {
         readStream.pipe(writeStream);
       });
     }
-    writeStream.once(eventName, cb);
+    writeStream.once(eventName, function() {
+        if (modified) {
+            //target file modified date sync.
+            fs.utimesSync(target, file.atime, file.mtime);
+            cb();
+        }
+        else cb();
+    });
   }
 
   function rmFile(file, done) {
diff --git a/test/modified-files/out/a b/test/modified-files/out/a
new file mode 100644
index 0000000..d606037
--- /dev/null
+++ b/test/modified-files/out/a
@@ -0,0 +1 @@
+test2
\ No newline at end of file
diff --git a/test/modified-files/src/a b/test/modified-files/src/a
new file mode 100644
index 0000000..29f446a
--- /dev/null
+++ b/test/modified-files/src/a
@@ -0,0 +1 @@
+test3
\ No newline at end of file
diff --git a/test/ncp.js b/test/ncp.js
index 3ddc310..bc6df22 100644
--- a/test/ncp.js
+++ b/test/ncp.js
@@ -5,9 +5,11 @@ var assert = require('assert'),
     path = require('path'),
     rimraf = require('rimraf'),
     readDirFiles = require('read-dir-files'),
+    util = require('util'),
     ncp = require('../').ncp;
 
 
+
 describe('ncp', function () {
   describe('regular files and directories', function () {
     var fixtures = path.join(__dirname, 'regular-fixtures'),
@@ -166,4 +168,30 @@ describe('ncp', function () {
       });
     });
   });
-});
+
+  describe('modified files copies', function () {
+      var fixtures = path.join(__dirname, 'modified-files'),
+          src = path.join(fixtures, 'src'),
+          out = path.join(fixtures, 'out');
+
+      it('if file not exists copy file to target', function(cb) {
+          rimraf(out, function() {
+              ncp(src, out, {modified: true, clobber: false}, function (err) {
+                  assert.equal(fs.existsSync(out), true);
+                  cb();
+              });
+          });
+      });
+
+      it('change source file mtime and copy', function(cb) {
+          fs.utimesSync(src+"/a", new Date().getTime()/1000, new Date('2015-01-01 00:00:00').getTime()/1000);
+          ncp(src, out, {modified: true, clobber: false}, function (err) {
+              fs.stat(out+"/a", function(err, stats) {
+                  assert.equal(stats.mtime.getTime(), new Date('2015-01-01 00:00:00').getTime());
+                  cb();
+              });
+          });
+      });
+
+  });
+});
\ No newline at end of file