diff --git a/bin/node-template/node/Cargo.toml b/bin/node-template/node/Cargo.toml
index d545943de95ff..fa2f02d7250ba 100644
--- a/bin/node-template/node/Cargo.toml
+++ b/bin/node-template/node/Cargo.toml
@@ -12,7 +12,7 @@ repository = "https://github.com/paritytech/substrate/"
 name = "node-template"
 
 [dependencies]
-futures = "0.3.1"
+futures = "0.3.4"
 log = "0.4.8"
 structopt = "0.3.8"
 
diff --git a/bin/node/cli/Cargo.toml b/bin/node/cli/Cargo.toml
index d45f5d7848baf..00ab7b08db248 100644
--- a/bin/node/cli/Cargo.toml
+++ b/bin/node/cli/Cargo.toml
@@ -106,7 +106,7 @@ sc-keystore = { version = "2.0.0-alpha.5", path = "../../../client/keystore" }
 sc-consensus-babe = { version = "0.8.0-alpha.5", features = ["test-helpers"], path = "../../../client/consensus/babe" }
 sc-consensus-epochs = { version = "0.8.0-alpha.5", path = "../../../client/consensus/epochs" }
 sc-service-test = { version = "2.0.0-dev", path = "../../../client/service/test" }
-futures = "0.3.1"
+futures = "0.3.4"
 tempfile = "3.1.0"
 assert_cmd = "0.12"
 nix = "0.17"
diff --git a/client/authority-discovery/Cargo.toml b/client/authority-discovery/Cargo.toml
index 5a7f78b95d34c..a5cb723fc40d0 100644
--- a/client/authority-discovery/Cargo.toml
+++ b/client/authority-discovery/Cargo.toml
@@ -16,7 +16,7 @@ prost-build = "0.6.1"
 bytes = "0.5.0"
 codec = { package = "parity-scale-codec", default-features = false, version = "1.2.0" }
 derive_more = "0.99.2"
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 libp2p = { version = "0.16.2", default-features = false, features = ["secp256k1", "libp2p-websocket"] }
 log = "0.4.8"
diff --git a/client/basic-authorship/Cargo.toml b/client/basic-authorship/Cargo.toml
index 34ce9c948c011..495642296e266 100644
--- a/client/basic-authorship/Cargo.toml
+++ b/client/basic-authorship/Cargo.toml
@@ -10,7 +10,7 @@ description = "Basic implementation of block-authoring logic."
 
 [dependencies]
 log = "0.4.8"
-futures = "0.3.1"
+futures = "0.3.4"
 codec = { package = "parity-scale-codec", version = "1.2.0" }
 sp-api = { version = "2.0.0-alpha.5", path = "../../primitives/api" }
 sp-runtime = { version = "2.0.0-alpha.5", path = "../../primitives/runtime" }
diff --git a/client/cli/Cargo.toml b/client/cli/Cargo.toml
index cc1b90dd2f498..d623d670ad210 100644
--- a/client/cli/Cargo.toml
+++ b/client/cli/Cargo.toml
@@ -20,7 +20,7 @@ ansi_term = "0.12.1"
 lazy_static = "1.4.0"
 app_dirs = "1.2.1"
 tokio = { version = "0.2.9", features = [ "signal", "rt-core", "rt-threaded" ] }
-futures = "0.3.1"
+futures = "0.3.4"
 fdlimit = "0.1.4"
 serde_json = "1.0.41"
 sc-informant = { version = "0.8.0-alpha.5", path = "../informant" }
diff --git a/client/consensus/aura/Cargo.toml b/client/consensus/aura/Cargo.toml
index ced8617375698..4f120abc96ff3 100644
--- a/client/consensus/aura/Cargo.toml
+++ b/client/consensus/aura/Cargo.toml
@@ -18,7 +18,7 @@ sc-client-api = { version = "2.0.0-alpha.5", path = "../../api" }
 codec = { package = "parity-scale-codec", version = "1.2.0" }
 sp-consensus = { version = "0.8.0-alpha.5", path = "../../../primitives/consensus/common" }
 derive_more = "0.99.2"
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 sp-inherents = { version = "2.0.0-alpha.5", path = "../../../primitives/inherents" }
 sc-keystore = { version = "2.0.0-alpha.5", path = "../../keystore" }
diff --git a/client/consensus/babe/Cargo.toml b/client/consensus/babe/Cargo.toml
index a0d73180ed177..1a725868fba0a 100644
--- a/client/consensus/babe/Cargo.toml
+++ b/client/consensus/babe/Cargo.toml
@@ -36,7 +36,7 @@ sc-consensus-uncles = { version = "0.8.0-alpha.5", path = "../uncles" }
 sc-consensus-slots = { version = "0.8.0-alpha.5", path = "../slots" }
 sp-runtime = { version = "2.0.0-alpha.5", path = "../../../primitives/runtime" }
 fork-tree = { version = "2.0.0-alpha.5", path = "../../../utils/fork-tree" }
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 parking_lot = "0.10.0"
 log = "0.4.8"
diff --git a/client/consensus/babe/rpc/Cargo.toml b/client/consensus/babe/rpc/Cargo.toml
index 1f820cd66bd01..193f7d73fac65 100644
--- a/client/consensus/babe/rpc/Cargo.toml
+++ b/client/consensus/babe/rpc/Cargo.toml
@@ -18,7 +18,7 @@ serde = { version = "1.0.104", features=["derive"] }
 sp-blockchain = { version = "2.0.0-alpha.5", path = "../../../../primitives/blockchain" }
 sp-runtime = { version = "2.0.0-alpha.5", path = "../../../../primitives/runtime" }
 sc-consensus-epochs = { version = "0.8.0-alpha.5", path = "../../epochs" }
-futures = "0.3.1"
+futures = "0.3.4"
 derive_more = "0.99.2"
 sp-api = { version = "2.0.0-alpha.5", path = "../../../../primitives/api" }
 sp-consensus = { version = "0.8.0-alpha.5", path = "../../../../primitives/consensus/common" }
diff --git a/client/consensus/manual-seal/Cargo.toml b/client/consensus/manual-seal/Cargo.toml
index edb98ab21aaeb..3bb801686847c 100644
--- a/client/consensus/manual-seal/Cargo.toml
+++ b/client/consensus/manual-seal/Cargo.toml
@@ -10,7 +10,7 @@ repository = "https://github.com/paritytech/substrate/"
 
 [dependencies]
 derive_more = "0.99.2"
-futures = "0.3.1"
+futures = "0.3.4"
 jsonrpc-core = "14.0.5"
 jsonrpc-core-client = "14.0.5"
 jsonrpc-derive = "14.0.5"
diff --git a/client/consensus/slots/Cargo.toml b/client/consensus/slots/Cargo.toml
index fd05cf7ca4e4a..79d5a6c51f1ec 100644
--- a/client/consensus/slots/Cargo.toml
+++ b/client/consensus/slots/Cargo.toml
@@ -20,7 +20,7 @@ sp-api = { version = "2.0.0-alpha.5", path = "../../../primitives/api" }
 sc-telemetry = { version = "2.0.0-alpha.5", path = "../../telemetry" }
 sp-consensus = { version = "0.8.0-alpha.5", path = "../../../primitives/consensus/common" }
 sp-inherents = { version = "2.0.0-alpha.5", path = "../../../primitives/inherents" }
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 parking_lot = "0.10.0"
 log = "0.4.8"
diff --git a/client/finality-grandpa/Cargo.toml b/client/finality-grandpa/Cargo.toml
index a202f9d20541f..c18b9bf45e638 100644
--- a/client/finality-grandpa/Cargo.toml
+++ b/client/finality-grandpa/Cargo.toml
@@ -12,7 +12,7 @@ documentation = "https://docs.rs/sc-finality-grandpa"
 
 [dependencies]
 fork-tree = { version = "2.0.0-alpha.5", path = "../../utils/fork-tree" }
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 log = "0.4.8"
 parking_lot = "0.10.0"
diff --git a/client/informant/Cargo.toml b/client/informant/Cargo.toml
index 9f3a93fbae53a..0675a48ac6683 100644
--- a/client/informant/Cargo.toml
+++ b/client/informant/Cargo.toml
@@ -10,7 +10,7 @@ repository = "https://github.com/paritytech/substrate/"
 
 [dependencies]
 ansi_term = "0.12.1"
-futures = "0.3.1"
+futures = "0.3.4"
 log = "0.4.8"
 parity-util-mem = { version = "0.6.0", default-features = false, features = ["primitive-types"] }
 wasm-timer = "0.2"
diff --git a/client/network-gossip/Cargo.toml b/client/network-gossip/Cargo.toml
index c0418125a449a..e68f0f3f40364 100644
--- a/client/network-gossip/Cargo.toml
+++ b/client/network-gossip/Cargo.toml
@@ -11,7 +11,7 @@ documentation = "https://docs.rs/sc-network-gossip"
 
 
 [dependencies]
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 libp2p = { version = "0.16.2", default-features = false, features = ["libp2p-websocket"] }
 log = "0.4.8"
diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml
index bb326cbefa7c6..b96cae8629836 100644
--- a/client/network/Cargo.toml
+++ b/client/network/Cargo.toml
@@ -22,7 +22,7 @@ either = "1.5.3"
 erased-serde = "0.3.9"
 fnv = "1.0.6"
 fork-tree = { version = "2.0.0-alpha.5", path = "../../utils/fork-tree" }
-futures = "0.3.1"
+futures = "0.3.4"
 futures_codec = "0.3.3"
 futures-timer = "3.0.1"
 wasm-timer = "0.2"
diff --git a/client/network/test/Cargo.toml b/client/network/test/Cargo.toml
index e3d7852dd476c..0a3fb1e3ea815 100644
--- a/client/network/test/Cargo.toml
+++ b/client/network/test/Cargo.toml
@@ -13,7 +13,7 @@ repository = "https://github.com/paritytech/substrate/"
 sc-network = { version = "0.8.0-alpha.5", path = "../" }
 log = "0.4.8"
 parking_lot = "0.10.0"
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 rand = "0.7.2"
 libp2p = { version = "0.16.2", default-features = false, features = ["libp2p-websocket"] }
diff --git a/client/offchain/Cargo.toml b/client/offchain/Cargo.toml
index 9dac18e946ebc..473425bc216a9 100644
--- a/client/offchain/Cargo.toml
+++ b/client/offchain/Cargo.toml
@@ -13,7 +13,7 @@ bytes = "0.5"
 sc-client-api = { version = "2.0.0-alpha.5", path = "../api" }
 sp-api = { version = "2.0.0-alpha.5", path = "../../primitives/api" }
 fnv = "1.0.6"
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 log = "0.4.8"
 threadpool = "1.7"
diff --git a/client/peerset/Cargo.toml b/client/peerset/Cargo.toml
index ea3a6b6974819..5d4aa28bf2776 100644
--- a/client/peerset/Cargo.toml
+++ b/client/peerset/Cargo.toml
@@ -11,7 +11,7 @@ documentation = "https://docs.rs/sc-peerset"
 
 
 [dependencies]
-futures = "0.3.1"
+futures = "0.3.4"
 libp2p = { version = "0.16.2", default-features = false }
 log = "0.4.8"
 serde_json = "1.0.41"
diff --git a/client/service/Cargo.toml b/client/service/Cargo.toml
index eb9e3dc2a6552..b3fb0953eb7af 100644
--- a/client/service/Cargo.toml
+++ b/client/service/Cargo.toml
@@ -20,7 +20,7 @@ wasmtime = [
 [dependencies]
 derive_more = "0.99.2"
 futures01 = { package = "futures", version = "0.1.29" }
-futures = "0.3.1"
+futures = "0.3.4"
 futures-diagnose = "1.0"
 parking_lot = "0.10.0"
 lazy_static = "1.4.0"
diff --git a/client/telemetry/Cargo.toml b/client/telemetry/Cargo.toml
index 543abd6a8b091..ee7e710c8526f 100644
--- a/client/telemetry/Cargo.toml
+++ b/client/telemetry/Cargo.toml
@@ -13,7 +13,7 @@ documentation = "https://docs.rs/sc-telemetry"
 [dependencies]
 bytes = "0.5"
 parking_lot = "0.10.0"
-futures = "0.3.1"
+futures = "0.3.4"
 futures-timer = "3.0.1"
 wasm-timer = "0.2.0"
 libp2p = { version = "0.16.2", default-features = false, features = ["libp2p-websocket"] }
diff --git a/client/transaction-pool/graph/Cargo.toml b/client/transaction-pool/graph/Cargo.toml
index 08593e67845cc..65ff1becec31a 100644
--- a/client/transaction-pool/graph/Cargo.toml
+++ b/client/transaction-pool/graph/Cargo.toml
@@ -10,7 +10,7 @@ description = "Generic Transaction Pool"
 
 [dependencies]
 derive_more = "0.99.2"
-futures = "0.3.1"
+futures = "0.3.4"
 log = "0.4.8"
 parking_lot = "0.10.0"
 serde = { version = "1.0.101", features = ["derive"] }
diff --git a/test-utils/client/Cargo.toml b/test-utils/client/Cargo.toml
index 66fd7286968cd..1078c43b31935 100644
--- a/test-utils/client/Cargo.toml
+++ b/test-utils/client/Cargo.toml
@@ -14,7 +14,7 @@ sc-client = { version = "0.8.0-alpha.5", path = "../../client/" }
 sc-client-db = { version = "0.8.0-alpha.5", features = ["test-helpers"], path = "../../client/db" }
 sp-consensus = { version = "0.8.0-alpha.5", path = "../../primitives/consensus/common" }
 sc-executor = { version = "0.8.0-alpha.5", path = "../../client/executor" }
-futures = "0.3.1"
+futures = "0.3.4"
 hash-db = "0.15.2"
 sp-keyring = { version = "2.0.0-alpha.5", path = "../../primitives/keyring" }
 codec = { package = "parity-scale-codec", version = "1.2.0" }
diff --git a/test-utils/runtime/client/Cargo.toml b/test-utils/runtime/client/Cargo.toml
index 3af6c4967eb0d..4de5e28ff727d 100644
--- a/test-utils/runtime/client/Cargo.toml
+++ b/test-utils/runtime/client/Cargo.toml
@@ -19,4 +19,4 @@ sp-blockchain = { version = "2.0.0-alpha.5", path = "../../../primitives/blockch
 codec = { package = "parity-scale-codec", version = "1.2.0" }
 sc-client-api = { version = "2.0.0-alpha.5", path = "../../../client/api" }
 sc-client = { version = "0.8.0-alpha.5", path = "../../../client/" }
-futures = "0.3.1"
+futures = "0.3.4"
diff --git a/utils/frame/rpc/system/Cargo.toml b/utils/frame/rpc/system/Cargo.toml
index a4f6833fad16d..780fcd33440ea 100644
--- a/utils/frame/rpc/system/Cargo.toml
+++ b/utils/frame/rpc/system/Cargo.toml
@@ -11,7 +11,7 @@ description = "FRAME's system exposed over Substrate RPC"
 [dependencies]
 sc-client = { version = "0.8.0-alpha.5", path = "../../../../client/" }
 codec = { package = "parity-scale-codec", version = "1.2.0" }
-futures = "0.3.1"
+futures = "0.3.4"
 jsonrpc-core = "14.0.3"
 jsonrpc-core-client = "14.0.3"
 jsonrpc-derive = "14.0.3"