diff --git a/Cargo.lock b/Cargo.lock
index 25d1dd886b9..9d5b7d5f676 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -684,7 +684,7 @@ dependencies = [
  "crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -772,7 +772,7 @@ dependencies = [
  "procedural-masquerade 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.15.22 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1123,7 +1123,7 @@ name = "fallible"
 version = "0.0.1"
 dependencies = [
  "hashglobe 0.1.0",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1287,7 +1287,7 @@ dependencies = [
  "servo_arc 0.1.1",
  "servo_atoms 0.0.1",
  "servo_url 0.0.1",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "truetype 0.26.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2012,7 +2012,7 @@ dependencies = [
  "servo_geometry 0.0.1",
  "servo_url 0.0.1",
  "size_of_test 0.0.1",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "style_traits 0.0.1",
  "unicode-bidi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2136,7 +2136,7 @@ dependencies = [
  "libservo 0.0.1",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo-egl 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2275,8 +2275,8 @@ dependencies = [
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_bytes 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_arc 0.1.1",
- "smallbitvec 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallbitvec 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "thin-slice 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2850,7 +2850,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3284,7 +3284,7 @@ dependencies = [
  "servo_geometry 0.0.1",
  "servo_rand 0.0.1",
  "servo_url 0.0.1",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "style_traits 0.0.1",
  "swapper 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3400,7 +3400,7 @@ dependencies = [
  "phf_codegen 0.7.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "precomputed-hash 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_arc 0.1.1",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "thin-slice 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3528,7 +3528,7 @@ dependencies = [
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_media_derive 0.1.0 (git+https://github.com/servo/media)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3762,12 +3762,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "smallbitvec"
-version = "2.1.1"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "smallvec"
-version = "0.6.3"
+version = "0.6.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3894,8 +3894,8 @@ dependencies = [
  "servo_atoms 0.0.1",
  "servo_config 0.0.1",
  "servo_url 0.0.1",
- "smallbitvec 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallbitvec 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "style_derive 0.0.1",
  "style_traits 0.0.1",
@@ -4575,7 +4575,7 @@ dependencies = [
  "ron 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_profiler 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "webrender_api 0.57.2 (git+https://github.com/servo/webrender)",
@@ -5115,8 +5115,8 @@ dependencies = [
 "checksum signpost 0.1.0 (git+https://github.com/pcwalton/signpost.git)" = "<none>"
 "checksum siphasher 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0df90a788073e8d0235a67e50441d47db7c8ad9debd91cbf43736a2a92d36537"
 "checksum slab 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5f9776d6b986f77b35c6cf846c11ad986ff128fe0b2b63a3628e3755e8d3102d"
-"checksum smallbitvec 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5c63726029f0069f88467873e47f392575f28f9f16b72ac65465263db4b3a13c"
-"checksum smallvec 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "26df3bb03ca5eac2e64192b723d51f56c1b1e0860e7c766281f4598f181acdc8"
+"checksum smallbitvec 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1764fe2b30ee783bfe3b9b37b2649d8d590b3148bb12e0079715d4d5c673562e"
+"checksum smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "b73ea3738b47563803ef814925e69be00799a8c07420be8b996f8e98fb2336db"
 "checksum smithay-client-toolkit 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ef227bd9251cf8f8e54f8dd9a4b164307e515f5312cd632ebc87b56f723893a2"
 "checksum stable_deref_trait 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "15132e0e364248108c5e2c02e3ab539be8d6f5d52a01ca9bbf27ed657316f02b"
 "checksum stb_truetype 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "48fa7d3136d8645909de1f7c7eb5416cc43057a75ace08fc39ae736bc9da8af1"