diff --git a/Cargo.lock b/Cargo.lock
index 88acf70f1..bc345ad59 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -333,7 +333,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "nix"
-version = "0.11.0"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -687,7 +687,7 @@ dependencies = [
  "libc 0.2.44 (git+https://github.com/rust-lang/libc)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "region 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.79 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -763,7 +763,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum memchr 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4b3629fe9fdbff6daa6c33b90f7c08355c1aca05a3d01fa8063b822fcf185f3b"
 "checksum memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2ffa2c986de11a9df78620c01eeaaf27d94d3ff02bf81bfcca953102dd0c6ff"
 "checksum memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0f9dc261e2b62d7a622bf416ea3c5245cdd5d9a7fcc428c0d06804dfce1775b3"
-"checksum nix 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d37e713a259ff641624b6cb20e3b12b2952313ba36b6823c0f16e6cfd9e5de17"
+"checksum nix 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "921f61dc817b379d0834e45d5ec45beaacfae97082090a49c2cf30dcbc30206f"
 "checksum nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"
 "checksum num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c51a3322e4bca9d212ad9a158a02abc6934d005490c054a2778df73a70aa0a30"
 "checksum proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)" = "3d7b7eaaa90b4a90a932a9ea6666c95a389e424eff347f0f793979289429feee"
diff --git a/Cargo.toml b/Cargo.toml
index f7deca20f..c7ea9571c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -43,7 +43,7 @@ log = "0.4.5"
 target-lexicon = "0.2.0"
 # libc = "0.2"
 libc = { git = "https://github.com/rust-lang/libc" }
-nix = "0.11"
+nix = "0.12.0"
 rayon = "1.0.3"
 byteorder = "1"