diff --git a/Cargo.lock b/Cargo.lock
index c2a27a41f1..847e23c475 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -964,6 +964,14 @@ dependencies = [
  "serde_derive 1.0.35 (git+https://github.com/servo/serde?branch=deserialize_from_enums5)",
 ]
 
+[[package]]
+name = "serde_bytes"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.35"
@@ -1341,6 +1349,7 @@ dependencies = [
  "euclid 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_bytes 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.35 (git+https://github.com/servo/serde?branch=deserialize_from_enums5)",
  "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1608,6 +1617,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum scoped_threadpool 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "3ef399c8893e8cb7aa9696e895427fab3a6bf265977bb96e126f24ddd2cda85a"
 "checksum scopeguard 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c79eb2c3ac4bc2507cda80e7f3ac5b88bd8eae4c0914d5663e6a8933994be918"
 "checksum serde 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "800fdb0a894572994f3970035a8a5f65d8ec2cd40e6cdf7d8cd9001d7b30648e"
+"checksum serde_bytes 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)" = "adb6e51a6b3696b301bc221d785f898b4457c619b51d7ce195a6d20baecb37b3"
 "checksum serde_derive 1.0.35 (git+https://github.com/servo/serde?branch=deserialize_from_enums5)" = "<none>"
 "checksum serde_derive_internals 0.22.1 (git+https://github.com/servo/serde?branch=deserialize_from_enums5)" = "<none>"
 "checksum serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "48b04779552e92037212c3615370f6bd57a40ebba7f20e554ff9f55e41a69a7b"
diff --git a/webrender_api/Cargo.toml b/webrender_api/Cargo.toml
index ee2715c9cb..5e34c19a20 100644
--- a/webrender_api/Cargo.toml
+++ b/webrender_api/Cargo.toml
@@ -20,6 +20,7 @@ ipc-channel = {version = "0.10.0", optional = true}
 euclid = { version = "0.17", features = ["serde"] }
 serde = { version = "=1.0.35", features = ["rc"] }
 serde_derive = { version = "=1.0.35", features = ["deserialize_in_place"] }
+serde_bytes = "0.10"
 time = "0.1"
 
 [target.'cfg(target_os = "macos")'.dependencies]
diff --git a/webrender_api/src/api.rs b/webrender_api/src/api.rs
index 3d97c7eea5..0dc527aaba 100644
--- a/webrender_api/src/api.rs
+++ b/webrender_api/src/api.rs
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+extern crate serde_bytes;
+
 use app_units::Au;
 use channel::{self, MsgSender, Payload, PayloadSender, PayloadSenderHelperMethods};
 use std::cell::Cell;
@@ -405,7 +407,11 @@ pub struct UpdateImage {
 
 #[derive(Clone, Deserialize, Serialize)]
 pub enum AddFont {
-    Raw(FontKey, Vec<u8>, u32),
+    Raw(
+        FontKey,
+        #[serde(with = "serde_bytes")] Vec<u8>,
+        u32
+    ),
     Native(FontKey, NativeFontHandle),
 }
 
diff --git a/webrender_api/src/image.rs b/webrender_api/src/image.rs
index c06deca6c7..ba0b935e5f 100644
--- a/webrender_api/src/image.rs
+++ b/webrender_api/src/image.rs
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+extern crate serde_bytes;
+
 use font::{FontInstanceKey, FontKey, FontTemplate};
 use std::sync::Arc;
 use {DevicePoint, DeviceUintRect, IdNamespace, TileOffset, TileSize};
@@ -110,11 +112,26 @@ impl ImageDescriptor {
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub enum ImageData {
-    Raw(Arc<Vec<u8>>),
-    Blob(BlobImageData),
+    Raw(#[serde(with = "serde_image_data_raw")] Arc<Vec<u8>>),
+    Blob(#[serde(with = "serde_bytes")] BlobImageData),
     External(ExternalImageData),
 }
 
+mod serde_image_data_raw {
+    extern crate serde_bytes;
+
+    use std::sync::Arc;
+    use serde::{Deserializer, Serializer};
+
+    pub fn serialize<'a, S: Serializer>(bytes: &'a Arc<Vec<u8>>, serializer: S) -> Result<S::Ok, S::Error> {
+        serde_bytes::serialize(bytes.as_slice(), serializer)
+    }
+
+    pub fn deserialize<'de, D: Deserializer<'de>>(deserializer: D) -> Result<Arc<Vec<u8>>, D::Error> {
+        serde_bytes::deserialize(deserializer).map(Arc::new)
+    }
+}
+
 impl ImageData {
     pub fn new(bytes: Vec<u8>) -> Self {
         ImageData::Raw(Arc::new(bytes))