diff --git a/xidlehook-core/Cargo.lock b/xidlehook-core/Cargo.lock
index 2d07d76..eec3ef9 100644
--- a/xidlehook-core/Cargo.lock
+++ b/xidlehook-core/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.15"
@@ -118,7 +120,7 @@ dependencies = [
  "memchr",
  "num_cpus",
  "once_cell",
- "pin-project-lite 0.2.5",
+ "pin-project-lite",
  "pin-utils",
  "slab",
  "wasm-bindgen-futures",
@@ -179,12 +181,6 @@ version = "3.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "63396b8a4b9de3f4fdfb320ab6080762242f66a8ef174c49d8e19b674db4cdbe"
 
-[[package]]
-name = "bytes"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e4cec68f03f32e44924783795810fa50a7035d8c8ebe78580ad7e6c703fba38"
-
 [[package]]
 name = "cache-padded"
 version = "1.1.1"
@@ -314,7 +310,7 @@ dependencies = [
  "futures-io",
  "memchr",
  "parking",
- "pin-project-lite 0.2.5",
+ "pin-project-lite",
  "waker-fn",
 ]
 
@@ -393,9 +389,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.87"
+version = "0.2.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "265d751d31d6780a3f956bb5b8022feba2d94eeee5a84ba64f4212eedca42213"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
 
 [[package]]
 name = "libpulse-binding"
@@ -440,6 +436,15 @@ version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
+[[package]]
+name = "memoffset"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "nb-connect"
 version = "1.0.3"
@@ -452,15 +457,15 @@ dependencies = [
 
 [[package]]
 name = "nix"
-version = "0.15.0"
+version = "0.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b2e0b4f3320ed72aaedb9a5ac838690a8047c7b275da22711fddff4f8a14229"
+checksum = "f5e06129fb611568ef4e868c14b326274959aa70ff7776e9d55323531c374945"
 dependencies = [
  "bitflags",
  "cc",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "libc",
- "void",
+ "memoffset",
 ]
 
 [[package]]
@@ -505,12 +510,6 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "427c3892f9e783d91cc128285287e70a59e206ca452770ece88a76f7a3eddd72"
 
-[[package]]
-name = "pin-project-lite"
-version = "0.1.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "257b64915a082f7811703966789728173279bdebb956b143dbcd23f6f970a777"
-
 [[package]]
 name = "pin-project-lite"
 version = "0.2.5"
@@ -695,14 +694,11 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "0.2.25"
+version = "1.19.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6703a273949a90131b290be1fe7b039d0fc884aa1935860dfcbe056f28cd8092"
+checksum = "c51a52ed6686dd62c320f9b89299e9dfb46f730c7a48e635c19f21d116cb1439"
 dependencies = [
- "bytes",
- "futures-core",
- "pin-project-lite 0.1.12",
- "slab",
+ "pin-project-lite",
 ]
 
 [[package]]
@@ -750,12 +746,6 @@ version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
 
-[[package]]
-name = "void"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
-
 [[package]]
 name = "waker-fn"
 version = "1.1.0"
diff --git a/xidlehook-core/Cargo.toml b/xidlehook-core/Cargo.toml
index bdac78f..2682189 100644
--- a/xidlehook-core/Cargo.toml
+++ b/xidlehook-core/Cargo.toml
@@ -14,7 +14,7 @@ categories = ["date-and-time"]
 [dependencies]
 async-std = { version = "1.2.0", optional = true }
 log = "0.4.8"
-nix = "0.15.0"
+nix = "0.20.2"
 structopt = "0.3.5"
 xcb = { version = "0.9.0", features = ["x11", "screensaver"] }
 tokio = { version = "1.3.0", optional = true, features = ["time"] }