diff --git a/Cargo.lock b/Cargo.lock
index bf4c9e29270..2924bd69fa0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -460,7 +460,7 @@ dependencies = [
  "gfx_traits 0.0.1",
  "hyper 0.10.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itertools 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "layout_traits 0.0.1",
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "metrics 0.0.1",
@@ -1288,7 +1288,7 @@ dependencies = [
 
 [[package]]
 name = "itertools"
-version = "0.5.10"
+version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "either 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2938,7 +2938,7 @@ dependencies = [
  "fnv 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "hashglobe 0.1.0",
  "html5ever 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools 0.5.10 (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)",
  "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)",
@@ -3688,7 +3688,7 @@ dependencies = [
 "checksum io-surface 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "623ace1e5f7de3512ec45302572a72349fdadcbef650c3dfc5d8244209be7653"
 "checksum iovec 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "29d062ee61fccdf25be172e70f34c9f6efc597e1fb8f6526e8437b2046ab26be"
 "checksum ipc-channel 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c10ed089b1921b01ef342c736a37ee0788eeb9a5f373bb2df1ba88d01125064f"
-"checksum itertools 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4833d6978da405305126af4ac88569b5d71ff758581ce5a987dbfa3755f694fc"
+"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 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"
diff --git a/components/constellation/Cargo.toml b/components/constellation/Cargo.toml
index c3a8cdd8c67..e821fabdc2d 100644
--- a/components/constellation/Cargo.toml
+++ b/components/constellation/Cargo.toml
@@ -23,7 +23,7 @@ gfx = {path = "../gfx"}
 gfx_traits = {path = "../gfx_traits"}
 hyper = "0.10"
 ipc-channel = "0.9"
-itertools = "0.5"
+itertools = "0.7"
 layout_traits = {path = "../layout_traits"}
 log = "0.3.5"
 metrics = {path = "../metrics"}
diff --git a/components/style/Cargo.toml b/components/style/Cargo.toml
index 46e55d36aff..de06aebbc14 100644
--- a/components/style/Cargo.toml
+++ b/components/style/Cargo.toml
@@ -39,7 +39,7 @@ fallible = { path = "../fallible" }
 fnv = "1.0"
 hashglobe = { path = "../hashglobe" }
 html5ever = {version = "0.22", optional = true}
-itertools = "0.5"
+itertools = "0.7.6"
 itoa = "0.3"
 lazy_static = "1"
 log = "0.3"