diff --git a/composer.json b/composer.json
index de8acee..aeba681 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "php": "~5.4"
     },
     "require-dev": {
-        "phpunit/phpunit": "4.1.*",
+        "phpunit/phpunit": "4.*",
         "satooshi/php-coveralls": "dev-master"
     },
     "autoload": {
diff --git a/src/Collection.php b/src/Collection.php
index 00db5a9..aee66bd 100644
--- a/src/Collection.php
+++ b/src/Collection.php
@@ -306,6 +306,20 @@ public function tail()
         return new Collection(array_slice($this->arr, 1));
     }
 
+    /**
+     * Returns a collection with all the elements in this collection,
+     * but with regenerated numeric indexes.
+     * <p>
+     * This uses the <code>array_values()</code> PHP built-in function.
+     * </p>
+     *
+     * @return Collection
+     */
+    public function values()
+    {
+        return new Collection(array_values($this->arr));
+    }
+
     /**
      * Creates the object.
      *
diff --git a/tests/CollectionTest.php b/tests/CollectionTest.php
index 7f43b7a..2d47d32 100644
--- a/tests/CollectionTest.php
+++ b/tests/CollectionTest.php
@@ -187,6 +187,22 @@ public function testTail()
         $this->assertEquals($col2, Collection::fromArray(['x'])->tail());
     }
 
+    public function testValues()
+    {
+        $col1 = $this->object->filter(function ($elem) { return $elem > 2; });
+        $this->assertEquals(3, $col1[2]);
+        $this->assertEquals(4, $col1[3]);
+        $this->assertEquals(5, $col1[4]);
+        $this->assertEquals(6, $col1[5]);
+        $col2 = $col1->values();
+        $this->assertEquals(3, $col2[0]);
+        $this->assertEquals(4, $col2[1]);
+        $this->assertEquals(5, $col2[2]);
+        $this->assertEquals(6, $col2[3]);
+        $col3 = Collection::fromArray([])->values();
+        $this->assertCount(0, $col3);
+    }
+
     public function testOffsetExists()
     {
         $this->assertTrue(isset($this->object[3]));