diff --git a/Cargo.lock b/Cargo.lock
index f5b2e27..be39bd6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -81,12 +81,6 @@ dependencies = [
  "nom",
 ]
 
-[[package]]
-name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -137,7 +131,7 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06ed27e177f16d65f0f0c22a213e17c696ace5dd64b14258b52f9417ccb52db4"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "crossbeam-utils",
 ]
 
@@ -148,7 +142,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e7e9d99fa91428effe99c5c6d4634cdeba32b8cf784fc428a2a687f61a952c49"
 dependencies = [
  "autocfg",
- "cfg-if 1.0.0",
+ "cfg-if",
  "lazy_static",
 ]
 
@@ -158,7 +152,7 @@ version = "3.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c15b8ec3b5755a188c141c1f6a98e76de31b936209bf066b647979e2a84764a9"
 dependencies = [
- "nix 0.20.0",
+ "nix",
  "winapi",
 ]
 
@@ -205,7 +199,7 @@ dependencies = [
  "hstrace_derive",
  "lazy_static",
  "log",
- "nix 0.17.0",
+ "nix",
  "num-derive",
  "num-traits",
  "serde",
@@ -235,7 +229,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 ]
 
 [[package]]
@@ -268,7 +262,7 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6f84d96438c15fcd6c3f244c8fce01d1e2b9c6b5623e9c711dc9286d8fc92d6a"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "winapi",
 ]
 
@@ -287,7 +281,7 @@ version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 ]
 
 [[package]]
@@ -296,19 +290,6 @@ version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
-[[package]]
-name = "nix"
-version = "0.17.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50e4785f2c3b7589a0d0c1dd60285e1188adac4006e8abd6dd578e1567027363"
-dependencies = [
- "bitflags",
- "cc",
- "cfg-if 0.1.10",
- "libc",
- "void",
-]
-
 [[package]]
 name = "nix"
 version = "0.20.0"
@@ -317,7 +298,7 @@ checksum = "fa9b4819da1bc61c0ea48b63b7bc8604064dd43013e7cc325df098d49cd7c18a"
 dependencies = [
  "bitflags",
  "cc",
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
 ]
 
@@ -368,7 +349,7 @@ version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fa7a782938e745763fe6907fc6ba86946d72f49fe7e21de074e08128a99fb018"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "instant",
  "libc",
  "redox_syscall",
@@ -568,12 +549,6 @@ version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
 
-[[package]]
-name = "void"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
-
 [[package]]
 name = "which"
 version = "3.1.1"
diff --git a/Cargo.toml b/Cargo.toml
index 3758158..1faf9bd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,7 +33,7 @@ clap = { version = "2.33.3", features = ["yaml"] }
 crossbeam-channel = "0.5.1"
 
 # Others
-nix = "0.17.0" # see https://github.com/nix-rust/nix/pull/1422
+nix = "0.20.0" # see https://github.com/nix-rust/nix/pull/1422
 bitflags = "1.2.1"
 crossbeam-utils = "0.8.3"
 ctrlc = "3.1.8"