diff --git a/src/Intervention/Image/Image.php b/src/Intervention/Image/Image.php
index d380c35a..8f2ffb12 100644
--- a/src/Intervention/Image/Image.php
+++ b/src/Intervention/Image/Image.php
@@ -413,6 +413,28 @@ class Image
         return $this->resize($width, $height, true);
     }
 
+    /**
+     * Resize image to new width, constraining proportions
+     *
+     * @param  integer $width
+     * @return Image
+     */
+    public function widen($width)
+    {
+        return $this->resize($width, null, true);
+    }
+
+    /**
+     * Resize image to new height, constraining proportions
+     *
+     * @param  integer $height
+     * @return Image
+     */
+    public function heighten($height)
+    {
+        return $this->resize(null, $height, true);
+    }
+
     /**
      * Resize image canvas
      *
diff --git a/tests/ImageTest.php b/tests/ImageTest.php
index 450a036f..195f1329 100644
--- a/tests/ImageTest.php
+++ b/tests/ImageTest.php
@@ -285,6 +285,40 @@ class ImageTest extends PHPUnit_Framework_Testcase
         $this->assertEquals($img->height, $original_height);
     }
 
+    public function testWidenImage()
+    {
+        $img = $this->getTestImage();
+
+        $img->widen(100);
+        $this->assertInternalType('int', $img->width);
+        $this->assertInternalType('int', $img->height);
+        $this->assertEquals($img->width, 100);
+        $this->assertEquals($img->height, 75);
+
+        $img->widen(1000);
+        $this->assertInternalType('int', $img->width);
+        $this->assertInternalType('int', $img->height);
+        $this->assertEquals($img->width, 1000);
+        $this->assertEquals($img->height, 750);
+    }
+
+    public function testHeightenImage()
+    {
+        $img = $this->getTestImage();
+
+        $img->heighten(150);
+        $this->assertInternalType('int', $img->width);
+        $this->assertInternalType('int', $img->height);
+        $this->assertEquals($img->width, 200);
+        $this->assertEquals($img->height, 150);
+
+        $img->heighten(900);
+        $this->assertInternalType('int', $img->width);
+        $this->assertInternalType('int', $img->height);
+        $this->assertEquals($img->width, 1200);
+        $this->assertEquals($img->height, 900);
+    }
+
     public function testResizeCanvas()
     {
         $img = $this->getTestImage();