diff --git a/Cargo.lock b/Cargo.lock
index 5a2b918e5f46..8779b4edc7fb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -41,7 +41,7 @@ name = "app_units"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -266,13 +266,13 @@ dependencies = [
  "azure 0.28.0 (git+https://github.com/servo/rust-azure)",
  "canvas_traits 0.0.1",
  "compositing 0.0.1",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "gleam 0.4.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "offscreen_gl_context 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_bytes 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_config 0.0.1",
@@ -284,7 +284,7 @@ dependencies = [
 name = "canvas_traits"
 version = "0.0.1"
 dependencies = [
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -555,19 +555,20 @@ dependencies = [
 
 [[package]]
 name = "cssparser"
-version = "0.23.2"
+version = "0.23.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cssparser-macros 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "dtoa-short 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "phf 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "procedural-masquerade 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.12.12 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -708,7 +709,7 @@ dependencies = [
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "msg 0.0.1",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -835,7 +836,7 @@ name = "enum_primitive"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -863,7 +864,7 @@ name = "euclid"
 version = "0.17.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -985,7 +986,7 @@ name = "geckoservo"
 version = "0.0.1"
 dependencies = [
  "atomic_refcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cstr 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.39 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1269,7 +1270,7 @@ dependencies = [
  "jpeg-decoder 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-iter 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-rational 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "png 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "scoped_threadpool 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1281,7 +1282,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayvec 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1347,7 +1348,7 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "0.3.1"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1433,7 +1434,7 @@ dependencies = [
  "script_traits 0.0.1",
  "selectors 0.19.0",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_arc 0.1.1",
  "servo_atoms 0.0.1",
  "servo_config 0.0.1",
@@ -1479,7 +1480,7 @@ dependencies = [
  "script_layout_interface 0.0.1",
  "script_traits 0.0.1",
  "selectors 0.19.0",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_allocator 0.0.1",
  "servo_arc 0.1.1",
  "servo_atoms 0.0.1",
@@ -1643,7 +1644,7 @@ name = "malloc_size_of"
 version = "0.0.1"
 dependencies = [
  "app_units 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "hashglobe 0.1.0",
  "hyper 0.10.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1689,7 +1690,7 @@ dependencies = [
  "phf_codegen 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache_codegen 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tendril 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1836,7 +1837,7 @@ dependencies = [
  "libc 0.2.39 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozjs_sys 0.50.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1860,7 +1861,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitreader 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1902,7 +1903,7 @@ dependencies = [
  "openssl 0.9.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "profile_traits 0.0.1",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo-websocket 0.21.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_allocator 0.0.1",
  "servo_arc 0.1.1",
@@ -1943,7 +1944,7 @@ dependencies = [
  "malloc_size_of 0.0.1",
  "malloc_size_of_derive 0.0.1",
  "msg 0.0.1",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_arc 0.1.1",
  "servo_config 0.0.1",
@@ -1984,7 +1985,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-iter 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1992,7 +1993,7 @@ name = "num-integer"
 version = "0.1.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2001,7 +2002,7 @@ version = "0.1.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2010,12 +2011,20 @@ version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.1.37"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -2117,7 +2126,7 @@ name = "ordered-float"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "unreachable 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2225,7 +2234,7 @@ dependencies = [
  "binary-space-partition 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2270,7 +2279,7 @@ dependencies = [
  "profile_traits 0.0.1",
  "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_config 0.0.1",
  "task_info 0.0.1",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2346,7 +2355,7 @@ version = "0.0.1"
 dependencies = [
  "malloc_size_of 0.0.1",
  "malloc_size_of_derive 0.0.1",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2500,7 +2509,7 @@ dependencies = [
  "chrono 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cmake 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "cookie 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "deny_public_fields 0.0.1",
  "devtools_traits 0.0.1",
  "dom_struct 0.0.1",
@@ -2530,7 +2539,7 @@ dependencies = [
  "mozjs 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "msg 0.0.1",
  "net_traits 0.0.1",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "offscreen_gl_context 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "phf 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2546,7 +2555,7 @@ dependencies = [
  "selectors 0.19.0",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_bytes 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_allocator 0.0.1",
  "servo_arc 0.1.1",
  "servo_atoms 0.0.1",
@@ -2576,7 +2585,7 @@ dependencies = [
  "app_units 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "atomic_refcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "canvas_traits 0.0.1",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "gfx_traits 0.0.1",
  "html5ever 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2657,7 +2666,7 @@ name = "selectors"
 version = "0.19.0"
 dependencies = [
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2710,12 +2719,12 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.2"
+version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dtoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3008,7 +3017,7 @@ dependencies = [
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "debug_unreachable 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "encoding_rs 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3017,7 +3026,7 @@ dependencies = [
  "hashglobe 0.1.0",
  "html5ever 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3026,7 +3035,7 @@ dependencies = [
  "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "nsstring 0.1.0",
  "num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ordered-float 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3070,13 +3079,13 @@ version = "0.0.1"
 dependencies = [
  "app_units 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "html5ever 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "selectors 0.19.0",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_arc 0.1.1",
  "servo_atoms 0.0.1",
  "servo_config 0.0.1",
@@ -3092,7 +3101,7 @@ version = "0.0.1"
 dependencies = [
  "app_units 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "malloc_size_of 0.0.1",
  "malloc_size_of_derive 0.0.1",
@@ -3108,7 +3117,7 @@ name = "stylo_tests"
 version = "0.0.1"
 dependencies = [
  "atomic_refcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cstr 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3563,12 +3572,12 @@ dependencies = [
  "image 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
  "plane-split 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ron 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.0 (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)",
@@ -3838,7 +3847,7 @@ dependencies = [
 "checksum crossbeam-deque 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f739f8c5363aca78cfb059edf753d8f0d36908c348f3d8d1503f03d8b75d9cf3"
 "checksum crossbeam-epoch 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "927121f5407de9956180ff5e936fe3cf4324279280001cd56b669d28ee7e9150"
 "checksum crossbeam-utils 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "2760899e32a1d58d5abb31129f8fae5de75220bc2176e77ff7c627ae45c918d9"
-"checksum cssparser 0.23.2 (registry+https://github.com/rust-lang/crates.io-index)" = "8a807ac3ab7a217829c2a3b65732b926b2befe6a35f33b4bf8b503692430f223"
+"checksum cssparser 0.23.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b906ac3f6108d8d0bfd4158469abe5909df1497116c8400346b5e08944579edd"
 "checksum cssparser-macros 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "079adec4af52bb5275eadd004292028c79eb3c5f5b4ee8086a36d4197032f6df"
 "checksum cstr 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b84061a2fd1af9319e98f733dc1ede67e0b208c455f17f1aa445cc8f4d0e635c"
 "checksum cstr-macros 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f9f316203d1ea36f4f18316822806f6999aa3dc5ed1adf51e35b77e3b3933d78"
@@ -3907,7 +3916,7 @@ dependencies = [
 "checksum iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dbe6e417e7d0975db6512b90796e8ce223145ac4e33c377e4a42882a0e88bb08"
 "checksum ipc-channel 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "db9daf099728ac5390c73f54e6e3708f0c514d2b51f24373830f568702eadfca"
 "checksum itertools 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)" = "b07332223953b5051bceb67e8c4700aa65291535568e1f12408c43c4a42c0394"
-"checksum itoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "eb2f404fbc66fd9aac13e998248505e7ecb2ad8e44ab6388684c5fb11c6c251c"
+"checksum itoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c069bbec61e1ca5a596166e55dfe4773ff745c3d16b700013bcaff9a6df2c682"
 "checksum jemalloc-sys 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "479294d130502fada93c7a957e8d059b632b03d6204aca37af557dee947f30a9"
 "checksum jemallocator 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "28b211ca65c440322b6d4d9b5b850b01e8e298393b7ebcb8205b7cbb14ea6329"
 "checksum jpeg-decoder 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "0dfe27a6c0dabd772d0f9b9f8701c4ca12c4d1eebcadf2be1f6f70396f6a1434"
@@ -3950,7 +3959,8 @@ dependencies = [
 "checksum num-integer 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)" = "ef1a4bf6f9174aa5783a9b4cc892cacd11aebad6c69ad027a0b65c6ca5f8aa37"
 "checksum num-iter 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)" = "f7d1891bd7b936f12349b7d1403761c8a0b85a18b148e9da4429d5d102c1a41e"
 "checksum num-rational 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)" = "c2dc5ea04020a8f18318ae485c751f8cfa1c0e69dcf465c29ddaaa64a313cc44"
-"checksum num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "e1cbfa3781f3fe73dc05321bed52a06d2d491eaa764c52335cf4399f046ece99"
+"checksum num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "92e5113e9fd4cc14ded8e499429f396a20f98c772a47cc8622a736e1ec843c31"
+"checksum num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dee092fcdf725aee04dd7da1d21debff559237d49ef1cb3e69bcb8ece44c7364"
 "checksum num_cpus 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca313f1862c7ec3e0dfe8ace9fa91b1d9cb5c84ace3d00f5ec4216238e93c167"
 "checksum objc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "877f30f37acef6749b1841cceab289707f211aecfc756553cd63976190e6cc2e"
 "checksum objc-foundation 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1add1b659e36c9607c7aab864a76c7a4c2760cd0cd2e120f3fb8b952c7e22bf9"
@@ -4007,7 +4017,7 @@ dependencies = [
 "checksum serde_bytes 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a73f5ad9bb83e1e407254c7a355f4efdaffe3c1442fc0657ddb8b9b6b225655"
 "checksum serde_derive 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)" = "f4ba7591cfe93755e89eeecdbcc668885624829b020050e6aec99c2a03bd3fd0"
 "checksum serde_derive_internals 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6e03f1c9530c3fb0a0a5c9b826bdd9246a5921ae995d75f512ac917fc4dd55b5"
-"checksum serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "48b04779552e92037212c3615370f6bd57a40ebba7f20e554ff9f55e41a69a7b"
+"checksum serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)" = "5c508584d9913df116b91505eec55610a2f5b16e9ed793c46e4d0152872b3e74"
 "checksum servo-egl 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "21069a884c33fe6ee596975e1f3849ed88c4ec857fbaf11d33672d8ebe051217"
 "checksum servo-fontconfig 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "93f799b649b4a2bf362398910eca35240704c7e765e780349b2bb1070d892262"
 "checksum servo-fontconfig-sys 4.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "38b494f03009ee81914b0e7d387ad7c145cafcd69747c2ec89b0e17bb94f303a"
diff --git a/components/style/Cargo.toml b/components/style/Cargo.toml
index ee9f914ffa6c..66c4b047f9bf 100644
--- a/components/style/Cargo.toml
+++ b/components/style/Cargo.toml
@@ -40,7 +40,7 @@ fnv = "1.0"
 hashglobe = { path = "../hashglobe" }
 html5ever = {version = "0.22", optional = true}
 itertools = "0.7.6"
-itoa = "0.3"
+itoa = "0.4.1"
 lazy_static = "1"
 log = "0.4"
 malloc_size_of = { path = "../malloc_size_of" }
diff --git a/servo-tidy.toml b/servo-tidy.toml
index 522aba1e87e0..61c0c7069b08 100644
--- a/servo-tidy.toml
+++ b/servo-tidy.toml
@@ -44,6 +44,7 @@ packages = [
   "quote",
   "unicode-xid",
   "log",
+  "num-traits",
   "rand"
 ]
 # Files that are ignored for all tidy and lint checks.