diff --git a/README.md b/README.md
index b3c65db..eacdc75 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ _libvips_ can take advantage of [liborc](http://code.entropywave.com/orc/) if pr
 
 ### Install libvips on Mac OS
 
-    brew install vips --without-fftw --without-libexif --without-libgsf \
+    brew install vips --with-webp --without-fftw --without-libexif --without-libgsf \
       --without-little-cms2 --without-orc --without-pango --without-pygobject3 \
       --without-gobject-introspection --without-python
 
@@ -36,12 +36,13 @@ _libvips_ can take advantage of [liborc](http://code.entropywave.com/orc/) if pr
 Compiling from source is recommended:
 
     sudo apt-get install automake build-essential git gobject-introspection \
-      libglib2.0-dev libjpeg-turbo8-dev libpng12-dev gtk-doc-tools
+      libglib2.0-dev webp libjpeg-turbo8-dev libpng12-dev gtk-doc-tools
     git clone https://github.com/jcupitt/libvips.git
     cd libvips
     ./bootstrap.sh
-    ./configure --enable-debug=no --without-python --without-fftw --without-libexif \
-      --without-libgf --without-little-cms --without-orc --without-pango --prefix=/usr
+    ./configure --enable-debug=no --with-webp --without-python --without-fftw \
+      --without-libexif --without-libgf --without-little-cms --without-orc \
+      --without-pango --prefix=/usr
     make
     sudo make install
     sudo ldconfig
diff --git a/testdata/1.jpg b/fixtures/1.jpg
similarity index 100%
rename from testdata/1.jpg
rename to fixtures/1.jpg
diff --git a/testdata/2.jpg b/fixtures/2.jpg
similarity index 100%
rename from testdata/2.jpg
rename to fixtures/2.jpg
diff --git a/testdata/3.jpg b/fixtures/3.jpg
similarity index 100%
rename from testdata/3.jpg
rename to fixtures/3.jpg
diff --git a/testdata/4.jpg b/fixtures/4.jpg
similarity index 100%
rename from testdata/4.jpg
rename to fixtures/4.jpg
diff --git a/testdata/5.jpg b/fixtures/5.jpg
similarity index 100%
rename from testdata/5.jpg
rename to fixtures/5.jpg
diff --git a/testdata/6.png b/fixtures/6.png
similarity index 100%
rename from testdata/6.png
rename to fixtures/6.png
diff --git a/testdata/7.png b/fixtures/7.png
similarity index 100%
rename from testdata/7.png
rename to fixtures/7.png
diff --git a/fixtures/test.webp b/fixtures/test.webp
new file mode 100644
index 0000000..48c4a68
Binary files /dev/null and b/fixtures/test.webp differ
diff --git a/vips.go b/vips.go
index 6605347..8512008 100644
--- a/vips.go
+++ b/vips.go
@@ -7,10 +7,10 @@ package vips
 import "C"
 
 import (
-	"bytes"
 	"errors"
 	"fmt"
 	"math"
+	"net/http"
 	"os"
 	"runtime"
 	"unsafe"
@@ -18,9 +18,10 @@ import (
 
 const DEBUG = false
 
-var (
-	MARKER_JPEG = []byte{0xff, 0xd8}
-	MARKER_PNG  = []byte{0x89, 0x50}
+const (
+	JPEG_MIME = "image/jpeg"
+	WEBP_MIME = "image/webp"
+	PNG_MIME  = "image/png"
 )
 
 type ImageType int
@@ -28,9 +29,12 @@ type ImageType int
 const (
 	UNKNOWN ImageType = iota
 	JPEG
+	WEBP
 	PNG
 )
 
+const QUALITY = 80
+
 type Interpolator int
 
 const (
@@ -69,13 +73,15 @@ type Options struct {
 func init() {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
+
 	err := C.vips_initialize()
 	if err != 0 {
 		C.vips_shutdown()
 		panic("unable to start vips!")
 	}
+
 	C.vips_concurrency_set(1)
-	C.vips_cache_set_max_mem(100 * 1048576) // 100Mb
+	C.vips_cache_set_max_mem(100 * 1024 * 1024)
 	C.vips_cache_set_max(500)
 }
 
@@ -89,9 +95,11 @@ func Resize(buf []byte, o Options) ([]byte, error) {
 	// detect (if possible) the file type
 	typ := UNKNOWN
 	switch {
-	case bytes.Equal(buf[:2], MARKER_JPEG):
+	case http.DetectContentType(buf) == JPEG_MIME:
 		typ = JPEG
-	case bytes.Equal(buf[:2], MARKER_PNG):
+	case http.DetectContentType(buf) == WEBP_MIME:
+		typ = WEBP
+	case http.DetectContentType(buf) == PNG_MIME:
 		typ = PNG
 	default:
 		return nil, errors.New("unknown image format")
@@ -101,17 +109,22 @@ func Resize(buf []byte, o Options) ([]byte, error) {
 	var image, tmpImage *C.struct__VipsImage
 
 	// feed it
+	imageLength := C.size_t(len(buf))
+	imageBuf := unsafe.Pointer(&buf[0])
+
 	switch typ {
 	case JPEG:
-		C.vips_jpegload_buffer_seq(unsafe.Pointer(&buf[0]), C.size_t(len(buf)), &image)
+		C.vips_jpegload_buffer_seq(imageBuf, imageLength, &image)
+	case WEBP:
+		C.vips_webpload_buffer_seq(imageBuf, imageLength, &image)
 	case PNG:
-		C.vips_pngload_buffer_seq(unsafe.Pointer(&buf[0]), C.size_t(len(buf)), &image)
+		C.vips_pngload_buffer_seq(imageBuf, imageLength, &image)
 	}
 	defer C.vips_thread_shutdown()
 
 	// defaults
 	if o.Quality == 0 {
-		o.Quality = 100
+		o.Quality = QUALITY
 	}
 
 	// get WxH
diff --git a/vips.h b/vips.h
index e02a4e4..4e1f16a 100644
--- a/vips.h
+++ b/vips.h
@@ -26,6 +26,12 @@ vips_jpegload_buffer_shrink(void *buf, size_t len, VipsImage **out, int shrink)
     return vips_jpegload_buffer(buf, len, out, "shrink", shrink, NULL);
 };
 
+int
+vips_webpload_buffer_seq(void *buf, size_t len, VipsImage **out)
+{
+    return vips_webpload_buffer(buf, len, out, "access", VIPS_ACCESS_SEQUENTIAL, NULL);
+};
+
 int
 vips_pngload_buffer_seq(void *buf, size_t len, VipsImage **out)
 {
diff --git a/vips_test.go b/vips_test.go
index 608719c..34338fd 100644
--- a/vips_test.go
+++ b/vips_test.go
@@ -5,13 +5,14 @@ import (
 	"image"
 	"image/jpeg"
 	"io/ioutil"
+	"net/http"
 	"os"
 	"testing"
 )
 
 func BenchmarkParallel(b *testing.B) {
 	options := Options{Width: 800, Height: 600, Crop: true}
-	f, err := os.Open("testdata/1.jpg")
+	f, err := os.Open("fixtures/1.jpg")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -34,7 +35,7 @@ func BenchmarkParallel(b *testing.B) {
 
 func BenchmarkSerialized(b *testing.B) {
 	options := Options{Width: 800, Height: 600, Crop: true}
-	f, err := os.Open("testdata/1.jpg")
+	f, err := os.Open("fixtures/1.jpg")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -108,15 +109,40 @@ func TestResize(t *testing.T) {
 
 		newWidth := uint(outImg.Bounds().Dx())
 		newHeight := uint(outImg.Bounds().Dy())
+
 		if newWidth != mt.expectedWidth ||
 			newHeight != mt.expectedHeight {
 			t.Fatalf("%d. Resize(imgData, %#v) => "+
 				"width: %v, height: %v, want width: %v, height: %v, "+
 				"originl size: %vx%v",
 				index, options,
-				newWidth, newHeight, mt.expectedWidth, mt.expectedHeight,
+				newWidth, newHeight,
+				mt.expectedWidth, mt.expectedHeight,
 				mt.origWidth, mt.origHeight,
 			)
 		}
 	}
 }
+
+func TestWebpResize(t *testing.T) {
+	options := Options{Width: 800, Height: 600, Crop: true}
+	img, err := os.Open("fixtures/test.webp")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer img.Close()
+
+	buf, err := ioutil.ReadAll(img)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	newImg, err := Resize(buf, options)
+	if err != nil {
+		t.Errorf("Resize(imgData, %#v) error: %#v", options, err)
+	}
+
+	if http.DetectContentType(newImg) != JPEG_MIME {
+		t.Fatal("Image is not webp valid")
+	}
+}