diff --git a/Cargo.lock b/Cargo.lock
index 9a986ab8ac5..cffe516ae6c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4957,25 +4957,14 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.8.2"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52da4364ffb0e4fe33a9841a98a3f3014fb964045ce4f7a45a398243c8d6b0c9"
+checksum = "57ee1c23c7c63b0c9250c339ffdc69255f110b298b901b9f6c82547b7b87caaf"
 dependencies = [
  "libc",
  "log",
- "miow",
- "ntapi",
  "wasi 0.11.0+wasi-snapshot-preview1",
- "winapi",
-]
-
-[[package]]
-name = "miow"
-version = "0.3.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9f1c5b025cda876f66ef43a113f91ebc9f4ccef34843000e0adf6ebbab84e21"
-dependencies = [
- "winapi",
+ "windows-sys 0.36.1",
 ]
 
 [[package]]
@@ -5223,15 +5212,6 @@ dependencies = [
  "version_check",
 ]
 
-[[package]]
-name = "ntapi"
-version = "0.3.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f6bb902e437b6d86e03cce10a7e2af662292c5dfef23b65899ea3ac9354ad44"
-dependencies = [
- "winapi",
-]
-
 [[package]]
 name = "num-bigint"
 version = "0.2.6"
@@ -12152,10 +12132,11 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.19.2"
+version = "1.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c51a52ed6686dd62c320f9b89299e9dfb46f730c7a48e635c19f21d116cb1439"
+checksum = "89797afd69d206ccd11fb0ea560a44bbb87731d020670e79416d442919257d42"
 dependencies = [
+ "autocfg",
  "bytes",
  "libc",
  "memchr",
diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml
index fdfa15e5af0..acbef329559 100644
--- a/client/network/Cargo.toml
+++ b/client/network/Cargo.toml
@@ -33,7 +33,7 @@ cumulus-relay-chain-interface = { path = "../relay-chain-interface" }
 
 [dev-dependencies]
 portpicker = "0.1.1"
-tokio = { version = "1.19.2", features = ["macros"] }
+tokio = { version = "1.21.0", features = ["macros"] }
 url = "2.2.2"
 
 # Substrate
diff --git a/client/pov-recovery/Cargo.toml b/client/pov-recovery/Cargo.toml
index da6147b173b..89c5f4e2a2d 100644
--- a/client/pov-recovery/Cargo.toml
+++ b/client/pov-recovery/Cargo.toml
@@ -31,7 +31,7 @@ cumulus-primitives-core = { path = "../../primitives/core" }
 cumulus-relay-chain-interface = {path = "../relay-chain-interface"}
 
 [dev-dependencies]
-tokio = { version = "1.19.2", features = ["macros"] }
+tokio = { version = "1.21.0", features = ["macros"] }
 
 # Cumulus
 cumulus-test-service = { path = "../../test/service" }
diff --git a/client/relay-chain-rpc-interface/Cargo.toml b/client/relay-chain-rpc-interface/Cargo.toml
index 38e1c37ad5f..626f1295f5e 100644
--- a/client/relay-chain-rpc-interface/Cargo.toml
+++ b/client/relay-chain-rpc-interface/Cargo.toml
@@ -18,7 +18,7 @@ sp-state-machine = { git = "https://github.com/paritytech/substrate", branch = "
 sc-client-api = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sp-storage = { git = "https://github.com/paritytech/substrate", branch = "master" }
 sc-rpc-api = { git = "https://github.com/paritytech/substrate", branch = "master" }
-tokio = { version = "1.19.2", features = ["sync"] }
+tokio = { version = "1.21.0", features = ["sync"] }
 
 futures = "0.3.24"
 futures-timer = "3.0.2"
diff --git a/polkadot-parachain/Cargo.toml b/polkadot-parachain/Cargo.toml
index f85f0b18df8..b1b7ecf9218 100644
--- a/polkadot-parachain/Cargo.toml
+++ b/polkadot-parachain/Cargo.toml
@@ -94,7 +94,7 @@ substrate-build-script-utils = { git = "https://github.com/paritytech/substrate"
 assert_cmd = "2.0"
 nix = "0.25"
 tempfile = "3.3.0"
-tokio = { version = "1.19.2", features = ["macros", "time", "parking_lot"] }
+tokio = { version = "1.21.0", features = ["macros", "time", "parking_lot"] }
 wait-timeout = "0.2"
 # purge_chain_works works with rococo-local and needs to allow this
 polkadot-cli = { git = "https://github.com/paritytech/polkadot", branch = "master", features = ["rococo-native"] }
diff --git a/test/service/Cargo.toml b/test/service/Cargo.toml
index 901ddd4be4a..d2fec695562 100644
--- a/test/service/Cargo.toml
+++ b/test/service/Cargo.toml
@@ -16,7 +16,7 @@ criterion = { version = "0.3.6", features = [ "async_tokio" ] }
 jsonrpsee = { version = "0.15.1", features = ["server"] }
 rand = "0.8.5"
 serde = { version = "1.0.144", features = ["derive"] }
-tokio = { version = "1.19.2", features = ["macros"] }
+tokio = { version = "1.21.0", features = ["macros"] }
 tracing = "0.1.36"
 url = "2.2.2"