diff --git a/vendor/vendor.json b/vendor/vendor.json
index 6df34f3..baa6b9e 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -68,9 +68,11 @@
 			"revisionTime": "2014-12-02T11:37:49-08:00"
 		},
 		{
+			"checksumSHA1": "cBdDkft9ir+lyLbeRQ4zCAoR0AY=",
 			"path": "willnorris.com/go/gifresize",
-			"revision": "104a7cd64b08d0ebbf2b5c81fa9c99858ba9ee46",
-			"revisionTime": "2015-12-07T22:25:22-08:00"
+			"revision": "6a222229fa0697e6da06ec80f8ffd0ada346669d",
+			"revisionTime": "2016-04-28T23:14:23Z"
 		}
-	]
+	],
+	"rootPath": "willnorris.com/go/imageproxy"
 }
diff --git a/vendor/willnorris.com/go/gifresize/gifresize.go b/vendor/willnorris.com/go/gifresize/gifresize.go
index cc5f2ed..7461f3b 100644
--- a/vendor/willnorris.com/go/gifresize/gifresize.go
+++ b/vendor/willnorris.com/go/gifresize/gifresize.go
@@ -55,8 +55,19 @@ func Process(w io.Writer, r io.Reader, transform TransformFunc) error {
 	// Resize each frame.
 	for index, frame := range im.Image {
 		bounds := frame.Bounds()
+		previous := img
 		draw.Draw(img, bounds, frame, bounds.Min, draw.Over)
 		im.Image[index] = imageToPaletted(transform(img), frame.Palette)
+
+		switch im.Disposal[index] {
+		case gif.DisposalBackground:
+			// I'm just assuming that the gif package will apply the appropriate
+			// background here, since there doesn't seem to be an easy way to
+			// access the global color table
+			img = image.NewRGBA(b)
+		case gif.DisposalPrevious:
+			img = previous
+		}
 	}
 
 	// Set image.Config to new height and width