diff --git a/Cargo.lock b/Cargo.lock
index 045e92b..e086a39 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6,12 +6,6 @@ version = "1.0.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1fd36ffbb1fb7c834eac128ea8d0e310c5aeb635548f9d58861e1308d46e71c"
 
-[[package]]
-name = "arc-swap"
-version = "0.4.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d25d88fd6b8041580a654f9d0c581a047baee2b3efee13275f2fc392fc75034"
-
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -397,9 +391,9 @@ checksum = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
 
 [[package]]
 name = "memchr"
-version = "2.3.3"
+version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
+checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
 [[package]]
 name = "mime"
@@ -438,9 +432,9 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.7.4"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8f1c83949125de4a582aa2da15ae6324d91cf6a58a70ea407643941ff98f558"
+checksum = "8962c171f57fcfffa53f4df1bb15ec4c8cf26a7569459c9ceb62d94aab0d9584"
 dependencies = [
  "libc",
  "log",
@@ -599,9 +593,9 @@ checksum = "c36fa947111f5c62a733b652544dd0016a43ce89619538a8ef92724a6f501a20"
 
 [[package]]
 name = "proc-macro-hack"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99c605b9a0adc77b7211c6b1f722dcb613d68d66859a44f3d485a6da332b0598"
+checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
 
 [[package]]
 name = "proc-macro-nested"
@@ -806,11 +800,10 @@ dependencies = [
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.2.1"
+version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3e12110bc539e657a646068aaf5eb5b63af9d0c1f7b29c97113fad80e15f035"
+checksum = "ce32ea0c6c56d5eacaeb814fbed9960547021d3edd010ded1425f180536b20ab"
 dependencies = [
- "arc-swap",
  "libc",
 ]
 
@@ -891,7 +884,7 @@ dependencies = [
  "lazy_static",
  "libc",
  "memchr",
- "mio 0.7.4",
+ "mio 0.7.5",
  "num_cpus",
  "parking_lot",
  "pin-project-lite",