--- a/testing/geckodriver/Cargo.lock
+++ b/testing/geckodriver/Cargo.lock
@@ -3,17 +3,17 @@ name = "geckodriver"
 version = "0.18.0"
 dependencies = [
  "chrono 0.2.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.24.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.10.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozprofile 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "mozrunner 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mozrunner 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozversion 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog-atomic 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog-stdlog 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog-stream 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -291,17 +291,17 @@ name = "mozprofile"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "tempdir 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "mozrunner"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozprofile 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winreg 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -719,17 +719,17 @@ dependencies = [
 "checksum lazy_static 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6abe0ee2e758cd6bc8a2cd56726359007748fbf4128da998b65d0b70f881e19b"
 "checksum libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)" = "38f5c2b18a287cf78b4097db62e20f43cace381dc76ae5c0a3073067f78b7ddc"
 "checksum log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ab83497bf8bf4ed2a74259c1c802351fcd67a65baa86394b6ba73c36f4838054"
 "checksum matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "efd7622e3022e1a6eaa602c4cea8912254e5582c9c692e9167714182244801b1"
 "checksum memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1dbccc0e46f1ea47b9f17e6d67c5a96bd27030519c519c9c91327e31275a47b4"
 "checksum mime 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "9d69889cdc6336ed56b174514ce876c4c3dc564cc23dd872e7bca589bb2a36c8"
 "checksum miniz-sys 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "28eaee17666671fa872e567547e8428e83308ebe5808cdf6a0e28397dbe2c726"
 "checksum mozprofile 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1a17b8bbde1dc0fbf1c8b073192d7c6f89baa932173ece7c1447de5e9cc7cd7e"
-"checksum mozrunner 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "68e6a21ef32a737399a34d9a89640b350d8b47ef03457225c0c223842cf2311f"
+"checksum mozrunner 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eb9d113eaa876c004ad5119224e318b36fd358658e47cdd49b45d209b2d7ac82"
 "checksum mozversion 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9fb3a40135553611560d3eb4a49479beaf0c91c5a93f723338c5b0edddf08f26"
 "checksum msdos_time 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "65ba9d75bcea84e07812618fedf284a64776c2f2ea0cad6bca7f69739695a958"
 "checksum num 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "98b15ba84e910ea7a1973bccd3df7b31ae282bf9d8bd2897779950c9b8303d40"
 "checksum num-integer 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)" = "21e4df1098d1d797d27ef0c69c178c3fab64941559b290fcae198e0825c9c8b5"
 "checksum num-iter 0.1.33 (registry+https://github.com/rust-lang/crates.io-index)" = "f7d1891bd7b936f12349b7d1403761c8a0b85a18b148e9da4429d5d102c1a41e"
 "checksum num-traits 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "e1cbfa3781f3fe73dc05321bed52a06d2d491eaa764c52335cf4399f046ece99"
 "checksum num_cpus 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a225d1e2717567599c24f88e49f00856c6e825a12125181ee42c4257e3688d39"
 "checksum percent-encoding 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de154f638187706bde41d9b4738748933d64e6b37bdbffc0b47a97d16a6ae356"

--- a/testing/geckodriver/Cargo.toml
+++ b/testing/geckodriver/Cargo.toml
@@ -13,17 +13,17 @@ license = "MPL-2.0"
 
 [dependencies]
 chrono = "^0.2"
 clap = {version = "^2.19", default-features = false, features = ["suggestions", "wrap_help"]}
 hyper = "0.10"
 lazy_static = "0.1"
 log = "0.3"
 mozprofile = "0.3.0"
-mozrunner = "0.4.1"
+mozrunner = "0.4.2"
 mozversion = "0.1.2"
 regex = "0.2"
 rustc-serialize = "0.3"
 slog = "1"
 slog-atomic = "0.4"
 slog-stdlog = "1"
 slog-stream = "1"
 uuid = "0.1.18"