diff --git a/Cargo.lock b/Cargo.lock
index d6269aa..427819e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "Inflector"
+version = "0.11.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe438c63458706e03479442743baae6c88256498e6431708f6dfc520a26515d3"
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.18"
@@ -12,10 +18,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "arrayvec"
-version = "0.5.2"
+name = "aliasable"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
+checksum = "250f629c0161ad8107cf89319e990051fae62832fd343083bea452d93e2205fd"
 
 [[package]]
 name = "async-channel"
@@ -44,26 +50,26 @@ dependencies = [
 
 [[package]]
 name = "async-global-executor"
-version = "2.0.4"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c290043c9a95b05d45e952fb6383c67bcb61471f60cfa21e890dba6654234f43"
+checksum = "0da5b41ee986eed3f524c380e6d64965aea573882a8907682ad100f7859305ca"
 dependencies = [
  "async-channel",
  "async-executor",
  "async-io",
- "async-mutex",
+ "async-lock",
  "blocking",
  "futures-lite",
- "num_cpus",
  "once_cell",
 ]
 
 [[package]]
 name = "async-imap"
-version = "0.5.0"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbb2df4b37a99456360a9ab475b723e3a499d51e060ab1bdd8d7565d23dcb74b"
+checksum = "31dd46675b8c5a2ecadd4ef690c84966eacf21b1e2327373a0d167494d1a1d28"
 dependencies = [
+ "async-channel",
  "async-native-tls",
  "async-std",
  "base64",
@@ -71,21 +77,22 @@ dependencies = [
  "chrono",
  "futures",
  "imap-proto",
- "lazy_static",
  "log",
  "nom",
+ "once_cell",
+ "ouroboros",
  "pin-utils",
- "rental",
- "stop-token 0.2.0",
+ "stop-token",
  "thiserror",
 ]
 
 [[package]]
 name = "async-io"
-version = "1.6.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a811e6a479f2439f0c04038796b5cfb3d2ad56c230e0f2d3f7b04d68cfee607b"
+checksum = "83e21f3a490c72b3b0cf44962180e60045de2925d8dff97918f7ee43c8f637c7"
 dependencies = [
+ "autocfg",
  "concurrent-queue",
  "futures-lite",
  "libc",
@@ -108,22 +115,13 @@ dependencies = [
  "event-listener",
 ]
 
-[[package]]
-name = "async-mutex"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "479db852db25d9dbf6204e6cb6253698f175c15726470f78af0d918e99d6156e"
-dependencies = [
- "event-listener",
-]
-
 [[package]]
 name = "async-native-tls"
-version = "0.3.3"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e9e7a929bd34c68a82d58a4de7f86fffdaf97fb2af850162a7bb19dd7269b33"
+checksum = "d57d4cec3c647232e1094dc013546c0b33ce785d8aeb251e1f20dfaf8a9a13fe"
 dependencies = [
- "async-std",
+ "futures-util",
  "native-tls",
  "thiserror",
  "url",
@@ -158,9 +156,9 @@ dependencies = [
 
 [[package]]
 name = "async-task"
-version = "4.2.0"
+version = "4.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30696a84d817107fc028e049980e09d5e140e8da8f1caeb17e8e950658a3cea9"
+checksum = "7a40729d2133846d9ed0ea60a8b9541bccddab49cd30f0715a1da672fe9a2524"
 
 [[package]]
 name = "async-trait"
@@ -545,9 +543,9 @@ dependencies = [
 
 [[package]]
 name = "imap-proto"
-version = "0.11.0"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3091b99ee5b80f9b010eb6f962af9495ad06561bf662126b077e8ca30e463182"
+checksum = "f256a8086d5a408348cddb97d8a07e7d10f861067c497e850e67c9aeda014fda"
 dependencies = [
  "nom",
 ]
@@ -601,19 +599,6 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
-[[package]]
-name = "lexical-core"
-version = "0.7.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6607c62aa161d23d17a9072cc5da0be67cdfc89d3afb1e8d9c842bebc2525ffe"
-dependencies = [
- "arrayvec",
- "bitflags",
- "cfg-if",
- "ryu",
- "static_assertions",
-]
-
 [[package]]
 name = "libc"
 version = "0.2.125"
@@ -669,6 +654,12 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "mio"
 version = "0.8.2"
@@ -712,13 +703,12 @@ dependencies = [
 
 [[package]]
 name = "nom"
-version = "5.1.2"
+version = "7.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffb4262d26ed83a1c0a33a38fe2bb15797329c85770da05e6b828ddb782627af"
+checksum = "a8903e5a29a317527874d0402f867152a3d21c908bb0b933e416c65e301d4c36"
 dependencies = [
- "lexical-core",
  "memchr",
- "version_check",
+ "minimal-lexical",
 ]
 
 [[package]]
@@ -819,6 +809,29 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "ouroboros"
+version = "0.15.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f56a2b0aa5fc88687aaf63e85a7974422790ce3419a2e1a15870f8a55227822"
+dependencies = [
+ "aliasable",
+ "ouroboros_macro",
+]
+
+[[package]]
+name = "ouroboros_macro"
+version = "0.15.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c40641e27d0eb38cae3dee081d920104d2db47a8e853c1a592ef68d33f5ebf4"
+dependencies = [
+ "Inflector",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "parking"
 version = "2.0.0"
@@ -874,10 +887,11 @@ checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
 
 [[package]]
 name = "polling"
-version = "2.2.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "685404d509889fade3e86fe3a5803bca2ec09b0c0778d5ada6ec8bf7a8de5259"
+checksum = "899b00b9c8ab553c743b3e11e87c5c7d423b2a2de229ba95b24a756344748011"
 dependencies = [
+ "autocfg",
  "cfg-if",
  "libc",
  "log",
@@ -885,6 +899,30 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.37"
@@ -944,27 +982,6 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "rental"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc89fe2acac36d212474d138aaf939c04a82df5b61d07011571ebce5aef81f2e"
-dependencies = [
- "rental-impl",
- "stable_deref_trait",
-]
-
-[[package]]
-name = "rental-impl"
-version = "0.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "475e68978dc5b743f2f40d8e0a8fdc83f1c5e78cbf4b8fa5e74e73beebc340de"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "ryu"
 version = "1.0.9"
@@ -1096,22 +1113,6 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
 
-[[package]]
-name = "static_assertions"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
-
-[[package]]
-name = "stop-token"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d5e0f9b25bdd9bf18e33d1f4dd0194c77034b66b4a4842b0bf7f5cf53ca733a"
-dependencies = [
- "async-std",
- "pin-project-lite",
-]
-
 [[package]]
 name = "stop-token"
 version = "0.7.0"
@@ -1536,7 +1537,7 @@ dependencies = [
  "serde",
  "serde_yaml",
  "simplelog",
- "stop-token 0.7.0",
+ "stop-token",
  "textwrap",
  "thiserror",
  "tokio",
diff --git a/Cargo.toml b/Cargo.toml
index b66ac2c..130755d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2021"
 serde = { version = "1.0", features = ["derive"] }
 serde_yaml = "0.8.24"
 derive-getters = "0.2.0"
-async-imap = "0.5.0"
+async-imap = "0.6.0"
 mailparse = "0.13.8"
 tokio = { version = "1.18", features = ["full"] }
 thiserror = "1.0"
@@ -21,8 +21,8 @@ async-trait = "0.1.53"
 # their types.
 # https://github.com/async-email/async-imap/pull/57
 futures = "0.3.15"
-async-native-tls = { version = "0.3.3" }
-async-std = { version = "1.8.0", default-features = false, features = ["std"] }
+async-native-tls = { version = "0.4" }
+async-std = { version = "1.8.0" }
 stop-token = "0.7"
 
 [dev-dependencies]