diff --git a/Cargo.lock b/Cargo.lock
index 96e0f655b12..2738e6004ad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -141,7 +141,7 @@ dependencies = [
 
 [[package]]
 name = "base64"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1695,7 +1695,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "net"
 version = "0.0.1"
 dependencies = [
- "base64 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "brotli 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "cookie 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "devtools_traits 0.0.1",
@@ -2259,7 +2259,7 @@ dependencies = [
  "app_units 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atomic_refcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "audio-video-metadata 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "base64 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bluetooth_traits 0.0.1",
  "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3172,7 +3172,7 @@ dependencies = [
 name = "webdriver_server"
 version = "0.0.1"
 dependencies = [
- "base64 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "cookie 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.10.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3354,7 +3354,7 @@ dependencies = [
 "checksum azure 0.15.0 (git+https://github.com/servo/rust-azure)" = "<none>"
 "checksum backtrace 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f551bc2ddd53aea015d453ef0b635af89444afa5ed2405dd0b2062ad5d600d80"
 "checksum backtrace-sys 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "d192fd129132fbc97497c1f2ec2c2c5174e376b95f535199ef4fe0a293d33842"
-"checksum base64 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9892882c3bd89ed02dec391c128984c772b663a29700c32b5de0b33861cdf2bd"
+"checksum base64 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "979d348dc50dfcd050a87df408ec61f01a0a27ee9b4ebdc6085baba8275b2c7f"
 "checksum binary-space-partition 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "df65281d9b2b5c332f5bfbd9bb5e5f2e62f627c259cf9dc9cd10fecb758be33d"
 "checksum bincode 1.0.0-alpha6 (registry+https://github.com/rust-lang/crates.io-index)" = "fb0cdeac1c5d567fdb487ae5853c024e4acf1ea85ba6a6552fe084e0805fea5d"
 "checksum bindgen 0.22.1 (registry+https://github.com/rust-lang/crates.io-index)" = "88f9d9abd7964621201c558021ff4f39b7b4d571a9a56a88844da9971e2344ce"
diff --git a/components/net/Cargo.toml b/components/net/Cargo.toml
index 47f412f28fa..e241d55f908 100644
--- a/components/net/Cargo.toml
+++ b/components/net/Cargo.toml
@@ -10,7 +10,7 @@ name = "net"
 path = "lib.rs"
 
 [dependencies]
-base64 = "0.4.1"
+base64 = "0.4.2"
 brotli = "1.0.6"
 cookie = "0.6"
 devtools_traits = {path = "../devtools_traits"}
diff --git a/components/script/Cargo.toml b/components/script/Cargo.toml
index 76facbdc2ec..1266e706582 100644
--- a/components/script/Cargo.toml
+++ b/components/script/Cargo.toml
@@ -28,7 +28,7 @@ angle = {git = "https://github.com/servo/angle", branch = "servo"}
 app_units = "0.4"
 audio-video-metadata = "0.1.2"
 atomic_refcell = "0.1"
-base64 = "0.4.1"
+base64 = "0.4.2"
 bitflags = "0.7"
 bluetooth_traits = {path = "../bluetooth_traits"}
 byteorder = "1.0"
diff --git a/components/webdriver_server/Cargo.toml b/components/webdriver_server/Cargo.toml
index 13647ef703d..43204dbd031 100644
--- a/components/webdriver_server/Cargo.toml
+++ b/components/webdriver_server/Cargo.toml
@@ -10,7 +10,7 @@ name = "webdriver_server"
 path = "lib.rs"
 
 [dependencies]
-base64 = "0.4.1"
+base64 = "0.4.2"
 cookie = "0.6"
 euclid = "0.11"
 hyper = "0.10"