diff --git a/Cargo.lock b/Cargo.lock
index 0260d3f99e..96b5d2ee4d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -36,7 +36,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cc"
-version = "1.0.67"
+version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -91,7 +91,7 @@ dependencies = [
  "rand_chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "raw-cpuid 8.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -101,13 +101,13 @@ version = "8.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.67 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.7"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -156,7 +156,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum block-padding 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fa79dedbb091f449f1f39e53edf88d5dbe95f895dae6135a8d7b881fb5af73f5"
 "checksum byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 "checksum byteorder 1.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
-"checksum cc 1.0.67 (registry+https://github.com/rust-lang/crates.io-index)" = "e3c69b077ad434294d3ce9f1f6143a2a4b89a8a2d54ef813d85003a4fd1137fd"
+"checksum cc 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)" = "4a72c244c1ff497a746a7e1fb3d14bd08420ecda70c8f25c7112f2781652d787"
 "checksum digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f3d0c8c8752312f9713efd397ff63acb9f85585afbf179282e720e7704954dd5"
 "checksum fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
 "checksum generic-array 0.12.4 (registry+https://github.com/rust-lang/crates.io-index)" = "ffdf9f34f1447443d37393cc6c2b8313aebddcd96906caf34e54c68d8e57d7bd"
@@ -165,7 +165,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rand_chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
 "checksum rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 "checksum raw-cpuid 8.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1fdf7d9dbd43f3d81d94a49c1c3df73cc2b3827995147e6cf7f89d4ec5483e73"
-"checksum redox_syscall 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "85dd92e586f7355c633911e11f77f3d12f04b1b1bd76a198bd34ae3af8341ef2"
+"checksum redox_syscall 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "5ab49abadf3f9e1c4bc499e8845e152ad87d2ad2d30371841171169e9d75feee"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
diff --git a/Cargo.toml b/Cargo.toml
index 4030e3acbb..1762f9e86d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 [dependencies]
 rand_chacha = "0.2"
 rand_core = "0.5"
-redox_syscall = "0.2.7"
+redox_syscall = "0.2.9"
 sha2 = "0.8"
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]