diff --git a/Cargo.lock b/Cargo.lock
index bf382f9..3243f3c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -170,16 +170,29 @@ dependencies = [
 
 [[package]]
 name = "async-executor"
-version = "0.1.2"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90f47c78ea98277cb1f5e6f60ba4fc762f5eafe9f6511bc2f7dfd8b75c225650"
+checksum = "eb877970c7b440ead138f6321a3b5395d6061183af779340b65e20c0fede9146"
 dependencies = [
+ "async-task",
+ "concurrent-queue",
+ "fastrand",
+ "futures-lite",
+ "once_cell",
+ "vec-arena",
+]
+
+[[package]]
+name = "async-global-executor"
+version = "1.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73079b49cd26b8fd5a15f68fc7707fc78698dc2a3d61430f2a7a9430230dfa04"
+dependencies = [
+ "async-executor",
  "async-io",
  "futures-lite",
- "multitask",
- "parking 1.0.6",
- "scoped-tls",
- "waker-fn",
+ "num_cpus",
+ "once_cell",
 ]
 
 [[package]]
@@ -200,19 +213,22 @@ dependencies = [
 
 [[package]]
 name = "async-io"
-version = "0.1.11"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ae22a338d28c75b53702b66f77979062cb29675db376d99e451af4fa79dedb3"
+checksum = "38628c78a34f111c5a6b98fc87dfc056cd1590b61afe748b145be4623c56d194"
 dependencies = [
  "cfg-if 0.1.10",
  "concurrent-queue",
+ "fastrand",
  "futures-lite",
  "libc",
+ "log",
  "once_cell",
- "parking 2.0.0",
+ "parking",
  "polling",
  "socket2",
  "vec-arena",
+ "waker-fn",
  "wepoll-sys-stjepang",
  "winapi 0.3.9",
 ]
@@ -264,21 +280,20 @@ dependencies = [
 
 [[package]]
 name = "async-std"
-version = "1.6.3"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46c8da367da62b8ff2313c406c9ac091c1b31d67a165becdd2de380d846260f7"
+checksum = "a7e82538bc65a25dbdff70e4c5439d52f068048ab97cdea0acd73f131594caa1"
 dependencies = [
- "async-executor",
+ "async-global-executor",
  "async-io",
  "async-mutex",
- "async-task",
  "blocking",
- "crossbeam-utils 0.7.2",
+ "crossbeam-utils 0.8.0",
  "futures-channel",
  "futures-core",
  "futures-io",
  "futures-lite",
- "futures-timer",
+ "gloo-timers",
  "kv-log-macro",
  "log",
  "memchr",
@@ -304,9 +319,9 @@ dependencies = [
 
 [[package]]
 name = "async-task"
-version = "3.0.0"
+version = "4.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c17772156ef2829aadc587461c7753af20b7e8db1529bc66855add962a3b35d3"
+checksum = "e91831deabf0d6d7ec49552e489aed63b7456a7a3c46cff62adad428110b0af0"
 
 [[package]]
 name = "async-trait"
@@ -496,15 +511,16 @@ dependencies = [
 
 [[package]]
 name = "blocking"
-version = "0.5.2"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea5800d29218fea137b0880387e5948694a23c93fcdde157006966693a865c7c"
+checksum = "c5e170dbede1f740736619b776d7251cb1b9095c435c34d8ca9f57fcd2f335e9"
 dependencies = [
  "async-channel",
+ "async-task",
  "atomic-waker",
+ "fastrand",
  "futures-lite",
  "once_cell",
- "waker-fn",
 ]
 
 [[package]]
@@ -583,11 +599,12 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "check-if-email-exists"
-version = "0.8.13"
+version = "0.8.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "296f71819c393e88ee0db32906d77ef52048ca6ff045cb75ee6fcb81f397f536"
+checksum = "8a249043792b6514edd5b887617ba443b3a4bb17471ff6efa82dd3ce93e04b41"
 dependencies = [
  "async-smtp",
+ "async-std",
  "async-std-resolver",
  "fast-socks5",
  "futures",
@@ -1132,15 +1149,15 @@ checksum = "de27142b013a8e869c14957e6d2edeef89e97c289e69d042ee3a49acd8b51789"
 
 [[package]]
 name = "futures-lite"
-version = "0.1.11"
+version = "1.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97999970129b808f0ccba93211201d431fcc12d7e1ffae03a61b5cedd1a7ced2"
+checksum = "5e6c079abfac3ab269e2927ec048dabc89d009ebfdda6b8ee86624f30c689658"
 dependencies = [
  "fastrand",
  "futures-core",
  "futures-io",
  "memchr",
- "parking 2.0.0",
+ "parking",
  "pin-project-lite 0.1.7",
  "waker-fn",
 ]
@@ -1177,10 +1194,6 @@ name = "futures-timer"
 version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e64b03909df88034c26dc1547e8970b91f98bdb65165d6a4e9110d94263dbb2c"
-dependencies = [
- "gloo-timers",
- "send_wrapper",
-]
 
 [[package]]
 name = "futures-util"
@@ -1923,17 +1936,6 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
-[[package]]
-name = "multitask"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c09c35271e7dcdb5f709779111f2c8e8ab8e06c1b587c1c6a9e179d865aaa5b4"
-dependencies = [
- "async-task",
- "concurrent-queue",
- "fastrand",
-]
-
 [[package]]
 name = "native-tls"
 version = "0.2.4"
@@ -2100,12 +2102,6 @@ dependencies = [
  "vcpkg",
 ]
 
-[[package]]
-name = "parking"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6cb300f271742d4a2a66c01b6b2fa0c83dfebd2e0bf11addb879a3547b4ed87c"
-
 [[package]]
 name = "parking"
 version = "2.0.0"
@@ -2201,12 +2197,13 @@ checksum = "d36492546b6af1463394d46f0c834346f31548646f6ba10849802c9c9a27ac33"
 
 [[package]]
 name = "polling"
-version = "0.1.5"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e09dffb745feffca5be3dea51c02b7b368c4597ab0219a82acaf9799ab3e0d1"
+checksum = "2a5388c2f19adcd6c462b8ca7db12b2c67e4c11c3d084361d1f5203d4389d990"
 dependencies = [
  "cfg-if 0.1.10",
  "libc",
+ "log",
  "wepoll-sys-stjepang",
  "winapi 0.3.9",
 ]
@@ -2525,12 +2522,6 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
-[[package]]
-name = "scoped-tls"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
-
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -2575,12 +2566,6 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
-[[package]]
-name = "send_wrapper"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f638d531eccd6e23b980caf34876660d38e265409d8e99b397ab71eb3612fad0"
-
 [[package]]
 name = "serde"
 version = "1.0.117"
@@ -3315,9 +3300,9 @@ checksum = "6454029bf181f092ad1b853286f23e2c507d8e8194d01d92da4a55c274a5508c"
 
 [[package]]
 name = "vec-arena"
-version = "0.5.2"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8cb18268690309760d59ee1a9b21132c126ba384f374c59a94db4bc03adeb561"
+checksum = "eafc1b9b2dfc6f5529177b62cf806484db55b32dc7c9658a118e11bbeb33061d"
 
 [[package]]
 name = "vec_map"
diff --git a/Cargo.toml b/Cargo.toml
index d5fd9b2..6ce36f5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ log = "0.4"
 pretty_env_logger = "0.4"
 regex = "1.4.2"
 url = "2.2.0"
-check-if-email-exists = "0.8.13"
+check-if-email-exists = "0.8.15"
 indicatif = "0.15.0"
 structopt = "0.3"
 toml = "0.5.7"