diff --git a/Cargo.lock b/Cargo.lock
index 4472307..da4fc81 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1086,9 +1086,9 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.6.21"
+version = "0.6.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "302dec22bcf6bae6dfb69c647187f4b4d0fb6f535521f7bc022430ce8e12008f"
+checksum = "4afd66f5b91bf2a3bc13fad0e21caedac168ca4c707504e75585648ae80e4cc4"
 dependencies = [
  "cfg-if",
  "fuchsia-zircon",
@@ -1097,7 +1097,7 @@ dependencies = [
  "kernel32-sys",
  "libc",
  "log",
- "miow 0.2.1",
+ "miow 0.2.2",
  "net2",
  "slab",
  "winapi 0.2.8",
@@ -1124,7 +1124,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f5e374eff525ce1c5b7687c4cef63943e7686524a387933ad27ca7ec43779cb3"
 dependencies = [
  "log",
- "mio 0.6.21",
+ "mio 0.6.23",
  "miow 0.3.3",
  "winapi 0.3.8",
 ]
@@ -1137,14 +1137,14 @@ checksum = "966257a94e196b11bb43aca423754d87429960a768de9414f3691d6957abf125"
 dependencies = [
  "iovec",
  "libc",
- "mio 0.6.21",
+ "mio 0.6.23",
 ]
 
 [[package]]
 name = "miow"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
+checksum = "ebd808424166322d4a38da87083bfddd3ac4c131334ed55856112eb06d46944d"
 dependencies = [
  "kernel32-sys",
  "net2",
@@ -1182,9 +1182,9 @@ dependencies = [
 
 [[package]]
 name = "net2"
-version = "0.2.33"
+version = "0.2.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42550d9fb7b6684a6d404d9fa7250c2eb2646df731d1c06afc06dcee9e1bcf88"
+checksum = "391630d12b68002ae1e25e8f974306474966550ad82dac6886fb8910c19568ae"
 dependencies = [
  "cfg-if",
  "libc",
@@ -1883,9 +1883,9 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "0.2.23"
+version = "0.2.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6d7ad61edd59bfcc7e80dababf0f4aed2e6d5e0ba1659356ae889752dfc12ff"
+checksum = "6703a273949a90131b290be1fe7b039d0fc884aa1935860dfcbe056f28cd8092"
 dependencies = [
  "bytes",
  "fnv",
@@ -1894,7 +1894,7 @@ dependencies = [
  "lazy_static",
  "libc",
  "memchr",
- "mio 0.6.21",
+ "mio 0.6.23",
  "mio-named-pipes",
  "mio-uds",
  "num_cpus",