diff --git a/Cargo.lock b/Cargo.lock
index a6c10e718..79313962d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -89,7 +89,7 @@ source = "git+https://github.com/async-email/async-imap?branch=dcc-stable#50e843
 dependencies = [
  "async-attributes 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "async-native-tls 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "async-std 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "async-std 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -119,7 +119,7 @@ version = "0.1.0"
 source = "git+https://github.com/async-email/async-smtp#6a4830032953f06020edc09db8daa06193e2b93f"
 dependencies = [
  "async-native-tls 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "async-std 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "async-std 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "async-trait 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bufstream 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -138,7 +138,7 @@ dependencies = [
 
 [[package]]
 name = "async-std"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "async-task 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -653,7 +653,7 @@ dependencies = [
  "async-imap 0.1.1 (git+https://github.com/async-email/async-imap?branch=dcc-stable)",
  "async-native-tls 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "async-smtp 0.1.0 (git+https://github.com/async-email/async-smtp)",
- "async-std 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "async-std 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -696,7 +696,7 @@ dependencies = [
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "stop-token 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "strum 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "strum_macros 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1768,7 +1768,7 @@ dependencies = [
  "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "zeroize 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1953,7 +1953,7 @@ dependencies = [
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2007,7 +2007,7 @@ dependencies = [
  "sha-1 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha3 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "try_from 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "twofish 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "x25519-dalek 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2771,7 +2771,7 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.0.0"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -2813,7 +2813,7 @@ name = "stop-token"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "async-std 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "async-std 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project-lite 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3196,7 +3196,7 @@ name = "unicode-normalization"
 version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3466,7 +3466,7 @@ dependencies = [
 "checksum async-imap 0.1.1 (git+https://github.com/async-email/async-imap?branch=dcc-stable)" = "<none>"
 "checksum async-native-tls 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a29e9e4ed87f4070dd6099d0bd5edfc7692c94442c80d656b50a802c6fde23b7"
 "checksum async-smtp 0.1.0 (git+https://github.com/async-email/async-smtp)" = "<none>"
-"checksum async-std 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "94ef4b71b2f56d7f8793c2a353fa0aa254833c55ab611dc6f3e0bd63db487e2d"
+"checksum async-std 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0bf6039b315300e057d198b9d3ab92ee029e31c759b7f1afae538145e6f18a3e"
 "checksum async-task 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de6bd58f7b9cc49032559422595c81cbfcf04db2f2133592f70af19e258a1ced"
 "checksum async-trait 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)" = "8b6dd385bb33043b833ba049048d57bdbb4d654a121ed68c71871ca51ff67070"
 "checksum atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)" = "1803c647a3ec87095e7ae7acfca019e98de5ec9a7d01343f611cf3152ed71a90"
@@ -3748,7 +3748,7 @@ dependencies = [
 "checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 "checksum slice-deque 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "ffddf594f5f597f63533d897427a570dbaa9feabaaa06595b74b71b7014507d7"
 "checksum smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "f7b0758c52e15a8b5e3691eae6cc559f08eee9406e548a4477ba4e67770a82b6"
-"checksum smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ecf3b85f68e8abaa7555aa5abdb1153079387e60b718283d732f03897fcfc86"
+"checksum smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44e59e0c9fa00817912ae6e4e6e3c4fe04455e75699d06eedc7d85917ed8e8f4"
 "checksum snafu 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "41207ca11f96a62cd34e6b7fdf73d322b25ae3848eb9d38302169724bb32cf27"
 "checksum snafu-derive 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4c5e338c8b0577457c9dda8e794b6ad7231c96e25b1b0dd5842d52249020c1c0"
 "checksum spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"