diff --git a/substrate/Cargo.lock b/substrate/Cargo.lock
index 3b8ec81c02..62657bbe3d 100644
--- a/substrate/Cargo.lock
+++ b/substrate/Cargo.lock
@@ -8386,9 +8386,9 @@ checksum = "f638d531eccd6e23b980caf34876660d38e265409d8e99b397ab71eb3612fad0"
 
 [[package]]
 name = "serde"
-version = "1.0.124"
+version = "1.0.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd761ff957cb2a45fbb9ab3da6512de9de55872866160b23c25f1a841e99d29f"
+checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
 dependencies = [
  "serde_derive",
 ]
@@ -8405,9 +8405,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.124"
+version = "1.0.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1800f7693e94e186f5e25a28291ae1570da908aff7d97a095dec1e56ff99069b"
+checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/substrate/bin/node-template/pallets/template/Cargo.toml b/substrate/bin/node-template/pallets/template/Cargo.toml
index 60118013c1..2e9746d0b8 100644
--- a/substrate/bin/node-template/pallets/template/Cargo.toml
+++ b/substrate/bin/node-template/pallets/template/Cargo.toml
@@ -20,7 +20,7 @@ frame-system = { default-features = false,  version = "4.0.0-dev",  path = "../.
 frame-benchmarking = { default-features = false,  version = "4.0.0-dev",  path = "../../../../frame/benchmarking", optional = true }
 
 [dev-dependencies]
-serde = { version = "1.0.119" }
+serde = { version = "1.0.126" }
 sp-core = { default-features = false, version = "4.0.0-dev", path = "../../../../primitives/core" }
 sp-io = { default-features = false, version = "4.0.0-dev", path = "../../../../primitives/io" }
 sp-runtime = { default-features = false, version = "4.0.0-dev", path = "../../../../primitives/runtime" }
diff --git a/substrate/bin/node/bench/Cargo.toml b/substrate/bin/node/bench/Cargo.toml
index b7b1101b92..ac643a1109 100644
--- a/substrate/bin/node/bench/Cargo.toml
+++ b/substrate/bin/node/bench/Cargo.toml
@@ -17,7 +17,7 @@ sc-cli = { version = "0.10.0-dev", path = "../../../client/cli" }
 sc-client-api = { version = "4.0.0-dev", path = "../../../client/api/" }
 sp-runtime = { version = "4.0.0-dev", path = "../../../primitives/runtime" }
 sp-state-machine = { version = "0.10.0-dev", path = "../../../primitives/state-machine" }
-serde = "1.0.101"
+serde = "1.0.126"
 serde_json = "1.0.41"
 structopt = "0.3"
 derive_more = "0.99.2"
diff --git a/substrate/bin/node/browser-testing/Cargo.toml b/substrate/bin/node/browser-testing/Cargo.toml
index bb92d6d614..17b3966766 100644
--- a/substrate/bin/node/browser-testing/Cargo.toml
+++ b/substrate/bin/node/browser-testing/Cargo.toml
@@ -10,7 +10,7 @@ license = "Apache-2.0"
 futures-timer = "3.0.2"
 libp2p = { version = "0.37.1", default-features = false }
 jsonrpc-core = "15.0.0"
-serde = "1.0.106"
+serde = "1.0.126"
 serde_json = "1.0.48"
 wasm-bindgen = { version = "=0.2.73", features = ["serde-serialize"] }
 wasm-bindgen-futures = "0.4.18"
diff --git a/substrate/bin/node/cli/Cargo.toml b/substrate/bin/node/cli/Cargo.toml
index 3b6c35ecb3..7c8c2d0e3d 100644
--- a/substrate/bin/node/cli/Cargo.toml
+++ b/substrate/bin/node/cli/Cargo.toml
@@ -35,7 +35,7 @@ crate-type = ["cdylib", "rlib"]
 [dependencies]
 # third-party dependencies
 codec = { package = "parity-scale-codec", version = "2.0.0" }
-serde = { version = "1.0.102", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 futures = { version = "0.3.9", features = ["compat"] }
 hex-literal = "0.3.1"
 log = "0.4.8"
diff --git a/substrate/client/chain-spec/Cargo.toml b/substrate/client/chain-spec/Cargo.toml
index e6d9aa9715..fcc5bc3bda 100644
--- a/substrate/client/chain-spec/Cargo.toml
+++ b/substrate/client/chain-spec/Cargo.toml
@@ -17,7 +17,7 @@ sc-chain-spec-derive = { version = "4.0.0-dev", path = "./derive" }
 impl-trait-for-tuples = "0.2.1"
 sc-network = { version = "0.10.0-dev", path = "../network" }
 sp-core = { version = "4.0.0-dev", path = "../../primitives/core" }
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 serde_json = "1.0.41"
 sp-runtime = { version = "4.0.0-dev", path = "../../primitives/runtime" }
 sc-telemetry = { version = "4.0.0-dev", path = "../telemetry" }
diff --git a/substrate/client/cli/Cargo.toml b/substrate/client/cli/Cargo.toml
index 82325238ca..f38686d228 100644
--- a/substrate/client/cli/Cargo.toml
+++ b/substrate/client/cli/Cargo.toml
@@ -41,7 +41,7 @@ names = "0.11.0"
 structopt = "0.3.8"
 sc-tracing = { version = "4.0.0-dev", path = "../tracing" }
 chrono = "0.4.10"
-serde = "1.0.111"
+serde = "1.0.126"
 thiserror = "1.0.21"
 
 [target.'cfg(not(target_os = "unknown"))'.dependencies]
diff --git a/substrate/client/consensus/babe/Cargo.toml b/substrate/client/consensus/babe/Cargo.toml
index f9dc45ed9c..cfcf503eba 100644
--- a/substrate/client/consensus/babe/Cargo.toml
+++ b/substrate/client/consensus/babe/Cargo.toml
@@ -22,7 +22,7 @@ sp-keystore = { version = "0.10.0-dev", path = "../../../primitives/keystore" }
 num-bigint = "0.2.3"
 num-rational = "0.2.2"
 num-traits = "0.2.8"
-serde = { version = "1.0.104", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 sp-version = { version = "4.0.0-dev", path = "../../../primitives/version" }
 sp-io = { version = "4.0.0-dev", path = "../../../primitives/io" }
 sp-inherents = { version = "4.0.0-dev", path = "../../../primitives/inherents" }
diff --git a/substrate/client/consensus/babe/rpc/Cargo.toml b/substrate/client/consensus/babe/rpc/Cargo.toml
index 12bce64c3a..5081edf255 100644
--- a/substrate/client/consensus/babe/rpc/Cargo.toml
+++ b/substrate/client/consensus/babe/rpc/Cargo.toml
@@ -19,7 +19,7 @@ jsonrpc-core = "15.1.0"
 jsonrpc-core-client = "15.1.0"
 jsonrpc-derive = "15.1.0"
 sp-consensus-babe = { version = "0.10.0-dev", path = "../../../../primitives/consensus/babe" }
-serde = { version = "1.0.104", features=["derive"] }
+serde = { version = "1.0.126", features=["derive"] }
 sp-blockchain = { version = "4.0.0-dev", path = "../../../../primitives/blockchain" }
 sp-runtime = { version = "4.0.0-dev", path = "../../../../primitives/runtime" }
 sc-consensus-epochs = { version = "0.10.0-dev", path = "../../epochs" }
diff --git a/substrate/client/network/Cargo.toml b/substrate/client/network/Cargo.toml
index 056ae5cbaa..7ca98150f9 100644
--- a/substrate/client/network/Cargo.toml
+++ b/substrate/client/network/Cargo.toml
@@ -47,7 +47,7 @@ rand = "0.7.2"
 sc-block-builder = { version = "0.10.0-dev", path = "../block-builder" }
 sc-client-api = { version = "4.0.0-dev", path = "../api" }
 sc-peerset = { version = "4.0.0-dev", path = "../peerset" }
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 serde_json = "1.0.41"
 smallvec = "1.5.0"
 sp-arithmetic = { version = "4.0.0-dev", path = "../../primitives/arithmetic" }
diff --git a/substrate/client/rpc-api/Cargo.toml b/substrate/client/rpc-api/Cargo.toml
index 057a692e83..0ed17813ee 100644
--- a/substrate/client/rpc-api/Cargo.toml
+++ b/substrate/client/rpc-api/Cargo.toml
@@ -26,7 +26,7 @@ sp-core = { version = "4.0.0-dev", path = "../../primitives/core" }
 sp-version = { version = "4.0.0-dev", path = "../../primitives/version" }
 sp-runtime = { path = "../../primitives/runtime", version = "4.0.0-dev" }
 sc-chain-spec = { path = "../chain-spec", version = "4.0.0-dev" }
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 serde_json = "1.0.41"
 sc-transaction-pool-api = { version = "4.0.0-dev", path = "../transaction-pool/api" }
 sp-rpc = { version = "4.0.0-dev", path = "../../primitives/rpc" }
diff --git a/substrate/client/rpc-servers/Cargo.toml b/substrate/client/rpc-servers/Cargo.toml
index 5f090ed3e7..025d586c4e 100644
--- a/substrate/client/rpc-servers/Cargo.toml
+++ b/substrate/client/rpc-servers/Cargo.toml
@@ -18,7 +18,7 @@ jsonrpc-core = "15.1.0"
 pubsub = { package = "jsonrpc-pubsub", version = "15.1.0" }
 log = "0.4.8"
 prometheus-endpoint = { package = "substrate-prometheus-endpoint", path = "../../utils/prometheus", version = "0.9.0"}
-serde = "1.0.101"
+serde = "1.0.126"
 serde_json = "1.0.41"
 sp-runtime = { version = "4.0.0-dev", path = "../../primitives/runtime" }
 
diff --git a/substrate/client/service/Cargo.toml b/substrate/client/service/Cargo.toml
index 2129bc1610..5359c80189 100644
--- a/substrate/client/service/Cargo.toml
+++ b/substrate/client/service/Cargo.toml
@@ -38,7 +38,7 @@ wasm-timer = "0.2"
 exit-future = "0.2.0"
 pin-project = "1.0.4"
 hash-db = "0.15.2"
-serde = "1.0.101"
+serde = "1.0.126"
 serde_json = "1.0.41"
 sc-keystore = { version = "4.0.0-dev", path = "../keystore" }
 sp-io = { version = "4.0.0-dev", path = "../../primitives/io" }
diff --git a/substrate/client/telemetry/Cargo.toml b/substrate/client/telemetry/Cargo.toml
index e4ea3e25d6..eb0daf2d58 100644
--- a/substrate/client/telemetry/Cargo.toml
+++ b/substrate/client/telemetry/Cargo.toml
@@ -22,7 +22,7 @@ libp2p = { version = "0.37.1", default-features = false, features = ["dns-async-
 log = "0.4.8"
 pin-project = "1.0.4"
 rand = "0.7.2"
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 take_mut = "0.2.2"
 void = "1.0.2"
 serde_json = "1.0.41"
diff --git a/substrate/client/tracing/Cargo.toml b/substrate/client/tracing/Cargo.toml
index 5d93b26dfb..97d27161d2 100644
--- a/substrate/client/tracing/Cargo.toml
+++ b/substrate/client/tracing/Cargo.toml
@@ -22,7 +22,7 @@ parking_lot = "0.11.1"
 regex = "1.4.2"
 rustc-hash = "1.1.0"
 erased-serde = "0.3.9"
-serde = "1.0.101"
+serde = "1.0.126"
 serde_json = "1.0.41"
 thiserror = "1.0.21"
 tracing = "0.1.25"
diff --git a/substrate/client/transaction-pool/Cargo.toml b/substrate/client/transaction-pool/Cargo.toml
index 10f1ed2f09..846bc68931 100644
--- a/substrate/client/transaction-pool/Cargo.toml
+++ b/substrate/client/transaction-pool/Cargo.toml
@@ -32,7 +32,7 @@ sp-blockchain = { version = "4.0.0-dev", path = "../../primitives/blockchain" }
 sp-utils = { version = "4.0.0-dev", path = "../../primitives/utils" }
 wasm-timer = "0.2"
 derive_more = "0.99.2"
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 linked-hash-map = "0.5.2"
 retain_mut = "0.1.3"
 
diff --git a/substrate/client/transaction-pool/api/Cargo.toml b/substrate/client/transaction-pool/api/Cargo.toml
index d0dcfa34fe..b49d47e53f 100644
--- a/substrate/client/transaction-pool/api/Cargo.toml
+++ b/substrate/client/transaction-pool/api/Cargo.toml
@@ -11,7 +11,7 @@ description = "Transaction pool client facing API."
 [dependencies]
 futures = { version = "0.3.1"  }
 log = { version = "0.4.8" }
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 thiserror = { version = "1.0.21" }
 sp-runtime = { version = "4.0.0-dev", default-features = false, path = "../../../primitives/runtime" }
 
diff --git a/substrate/frame/authorship/Cargo.toml b/substrate/frame/authorship/Cargo.toml
index f0d597b6ad..64a5f20769 100644
--- a/substrate/frame/authorship/Cargo.toml
+++ b/substrate/frame/authorship/Cargo.toml
@@ -24,7 +24,7 @@ impl-trait-for-tuples = "0.2.1"
 [dev-dependencies]
 sp-core = { version = "4.0.0-dev", path = "../../primitives/core" }
 sp-io ={ version = "4.0.0-dev", path = "../../primitives/io" }
-serde = { version = "1.0.101" }
+serde = { version = "1.0.126" }
 
 [features]
 default = ["std"]
diff --git a/substrate/frame/benchmarking/Cargo.toml b/substrate/frame/benchmarking/Cargo.toml
index c7908c3f97..69c107256e 100644
--- a/substrate/frame/benchmarking/Cargo.toml
+++ b/substrate/frame/benchmarking/Cargo.toml
@@ -28,7 +28,7 @@ log = { version = "0.4.14", default-features = false }
 
 [dev-dependencies]
 hex-literal = "0.3.1"
-serde = "1.0.101"
+serde = "1.0.126"
 
 [features]
 default = ["std"]
diff --git a/substrate/frame/democracy/Cargo.toml b/substrate/frame/democracy/Cargo.toml
index 178578992a..5170fc2a3a 100644
--- a/substrate/frame/democracy/Cargo.toml
+++ b/substrate/frame/democracy/Cargo.toml
@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
 sp-io = { version = "4.0.0-dev", default-features = false, path = "../../primitives/io" }
diff --git a/substrate/frame/example-parallel/Cargo.toml b/substrate/frame/example-parallel/Cargo.toml
index ab1b8bfbfa..761d0e4ff1 100644
--- a/substrate/frame/example-parallel/Cargo.toml
+++ b/substrate/frame/example-parallel/Cargo.toml
@@ -22,7 +22,7 @@ sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primit
 sp-tasks = { version = "4.0.0-dev", default-features = false, path = "../../primitives/tasks" }
 
 [dev-dependencies]
-serde = { version = "1.0.101" }
+serde = { version = "1.0.126" }
 
 [features]
 default = ["std"]
diff --git a/substrate/frame/lottery/Cargo.toml b/substrate/frame/lottery/Cargo.toml
index a0368c2e65..237345805d 100644
--- a/substrate/frame/lottery/Cargo.toml
+++ b/substrate/frame/lottery/Cargo.toml
@@ -26,7 +26,7 @@ frame-support-test = { version = "3.0.0", path = "../support/test" }
 pallet-balances = { version = "4.0.0-dev", path = "../balances" }
 sp-core = { version = "4.0.0-dev", path = "../../primitives/core" }
 sp-io = { version = "4.0.0-dev", path = "../../primitives/io" }
-serde = { version = "1.0.101" }
+serde = { version = "1.0.126" }
 
 [features]
 default = ["std"]
diff --git a/substrate/frame/merkle-mountain-range/primitives/Cargo.toml b/substrate/frame/merkle-mountain-range/primitives/Cargo.toml
index 94b56a0064..04b744ffb0 100644
--- a/substrate/frame/merkle-mountain-range/primitives/Cargo.toml
+++ b/substrate/frame/merkle-mountain-range/primitives/Cargo.toml
@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false }
 frame-support = { version = "4.0.0-dev", default-features = false, path = "../../support" }
 frame-system = { version = "4.0.0-dev", default-features = false, path = "../../system" }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 sp-api = { version = "4.0.0-dev", default-features = false, path = "../../../primitives/api" }
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../../../primitives/core" }
 sp-runtime = { version = "4.0.0-dev", default-features = false, path = "../../../primitives/runtime" }
diff --git a/substrate/frame/merkle-mountain-range/rpc/Cargo.toml b/substrate/frame/merkle-mountain-range/rpc/Cargo.toml
index 38c9bbe8aa..b99a8f35c0 100644
--- a/substrate/frame/merkle-mountain-range/rpc/Cargo.toml
+++ b/substrate/frame/merkle-mountain-range/rpc/Cargo.toml
@@ -18,7 +18,7 @@ jsonrpc-core = "15.1.0"
 jsonrpc-core-client = "15.1.0"
 jsonrpc-derive = "15.1.0"
 pallet-mmr-primitives = { version = "4.0.0-dev", path = "../primitives" }
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 sp-api = { version = "4.0.0-dev", path = "../../../primitives/api" }
 sp-blockchain = { version = "4.0.0-dev", path = "../../../primitives/blockchain" }
 sp-core = { version = "4.0.0-dev", path = "../../../primitives/core" }
diff --git a/substrate/frame/metadata/Cargo.toml b/substrate/frame/metadata/Cargo.toml
index 57ba40efea..332ce5b70c 100644
--- a/substrate/frame/metadata/Cargo.toml
+++ b/substrate/frame/metadata/Cargo.toml
@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../../primitives/core" }
 
diff --git a/substrate/frame/offences/Cargo.toml b/substrate/frame/offences/Cargo.toml
index 6d8038605c..c4295747d6 100644
--- a/substrate/frame/offences/Cargo.toml
+++ b/substrate/frame/offences/Cargo.toml
@@ -16,7 +16,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 pallet-balances = { version = "4.0.0-dev", default-features = false, path = "../balances" }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
-serde = { version = "1.0.101", optional = true }
+serde = { version = "1.0.126", optional = true }
 sp-runtime = { version = "4.0.0-dev", default-features = false, path = "../../primitives/runtime" }
 sp-staking = { version = "4.0.0-dev", default-features = false, path = "../../primitives/staking" }
 frame-support = { version = "4.0.0-dev", default-features = false, path = "../support" }
diff --git a/substrate/frame/session/benchmarking/Cargo.toml b/substrate/frame/session/benchmarking/Cargo.toml
index 58f68899d1..2f8e069347 100644
--- a/substrate/frame/session/benchmarking/Cargo.toml
+++ b/substrate/frame/session/benchmarking/Cargo.toml
@@ -24,7 +24,7 @@ pallet-session = { version = "4.0.0-dev", default-features = false, path = "../.
 rand = { version = "0.7.2", default-features = false }
 
 [dev-dependencies]
-serde = { version = "1.0.101" }
+serde = { version = "1.0.126" }
 codec = { package = "parity-scale-codec", version = "2.0.0", features = ["derive"] }
 sp-core = { version = "4.0.0-dev", path = "../../../primitives/core" }
 pallet-staking-reward-curve = { version = "4.0.0-dev", path = "../../staking/reward-curve" }
diff --git a/substrate/frame/staking/Cargo.toml b/substrate/frame/staking/Cargo.toml
index af5b5a976d..285fb11cc5 100644
--- a/substrate/frame/staking/Cargo.toml
+++ b/substrate/frame/staking/Cargo.toml
@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 static_assertions = "1.1.0"
-serde = { version = "1.0.101", optional = true }
+serde = { version = "1.0.126", optional = true }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
 sp-io ={ version = "4.0.0-dev", default-features = false, path = "../../primitives/io" }
diff --git a/substrate/frame/support/Cargo.toml b/substrate/frame/support/Cargo.toml
index 72fd4f9cd6..ed3a2f45a2 100644
--- a/substrate/frame/support/Cargo.toml
+++ b/substrate/frame/support/Cargo.toml
@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "2.2.0", default-features = false, features = ["derive", "max-encoded-len"] }
 frame-metadata = { version = "14.0.0-dev", default-features = false, path = "../metadata" }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
diff --git a/substrate/frame/support/test/Cargo.toml b/substrate/frame/support/test/Cargo.toml
index 001c88ba48..9dd0156e72 100644
--- a/substrate/frame/support/test/Cargo.toml
+++ b/substrate/frame/support/test/Cargo.toml
@@ -12,7 +12,7 @@ repository = "https://github.com/paritytech/substrate/"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = { version = "1.0.101", default-features = false, features = ["derive"] }
+serde = { version = "1.0.126", default-features = false, features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-io = { version = "4.0.0-dev", path = "../../../primitives/io", default-features = false }
 sp-state-machine = { version = "0.10.0-dev", optional = true, path = "../../../primitives/state-machine" }
diff --git a/substrate/frame/system/Cargo.toml b/substrate/frame/system/Cargo.toml
index 61e35c552a..744a3cc22a 100644
--- a/substrate/frame/system/Cargo.toml
+++ b/substrate/frame/system/Cargo.toml
@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../../primitives/core" }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
diff --git a/substrate/frame/system/benchmarking/Cargo.toml b/substrate/frame/system/benchmarking/Cargo.toml
index b6a5447199..2daa42366f 100644
--- a/substrate/frame/system/benchmarking/Cargo.toml
+++ b/substrate/frame/system/benchmarking/Cargo.toml
@@ -22,7 +22,7 @@ frame-support = { version = "4.0.0-dev", default-features = false, path = "../..
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../../../primitives/core" }
 
 [dev-dependencies]
-serde = { version = "1.0.101" }
+serde = { version = "1.0.126" }
 sp-io ={ version = "4.0.0-dev", path = "../../../primitives/io" }
 
 [features]
diff --git a/substrate/frame/tips/Cargo.toml b/substrate/frame/tips/Cargo.toml
index 32deca37e7..a0b554166c 100644
--- a/substrate/frame/tips/Cargo.toml
+++ b/substrate/frame/tips/Cargo.toml
@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
 sp-runtime = { version = "4.0.0-dev", default-features = false, path = "../../primitives/runtime" }
diff --git a/substrate/frame/transaction-payment/Cargo.toml b/substrate/frame/transaction-payment/Cargo.toml
index 6406b41a51..16f09d3e1d 100644
--- a/substrate/frame/transaction-payment/Cargo.toml
+++ b/substrate/frame/transaction-payment/Cargo.toml
@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.101", optional = true }
+serde = { version = "1.0.126", optional = true }
 smallvec = "1.4.1"
 
 sp-core = { version = "4.0.0-dev", path = "../../primitives/core", default-features = false }
diff --git a/substrate/frame/transaction-storage/Cargo.toml b/substrate/frame/transaction-storage/Cargo.toml
index 4504b9a07e..af6b66d2a0 100644
--- a/substrate/frame/transaction-storage/Cargo.toml
+++ b/substrate/frame/transaction-storage/Cargo.toml
@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = { version = "1.0.101", optional = true }
+serde = { version = "1.0.126", optional = true }
 hex-literal = { version = "0.3.1", optional = true }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false }
 frame-support = { version = "4.0.0-dev", default-features = false, path = "../support" }
diff --git a/substrate/frame/treasury/Cargo.toml b/substrate/frame/treasury/Cargo.toml
index 95c54dafe1..424119577d 100644
--- a/substrate/frame/treasury/Cargo.toml
+++ b/substrate/frame/treasury/Cargo.toml
@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.101", features = ["derive"], optional = true }
+serde = { version = "1.0.126", features = ["derive"], optional = true }
 impl-trait-for-tuples = "0.2.1"
 
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../../primitives/std" }
diff --git a/substrate/primitives/application-crypto/Cargo.toml b/substrate/primitives/application-crypto/Cargo.toml
index 3eee10d8c6..dd9d7f22d2 100644
--- a/substrate/primitives/application-crypto/Cargo.toml
+++ b/substrate/primitives/application-crypto/Cargo.toml
@@ -17,7 +17,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../core" }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../std" }
 sp-io = { version = "4.0.0-dev", default-features = false, path = "../io" }
 
diff --git a/substrate/primitives/arithmetic/Cargo.toml b/substrate/primitives/arithmetic/Cargo.toml
index 77f298ad46..b43e12cd78 100644
--- a/substrate/primitives/arithmetic/Cargo.toml
+++ b/substrate/primitives/arithmetic/Cargo.toml
@@ -20,7 +20,7 @@ integer-sqrt = "0.1.2"
 static_assertions = "1.1.0"
 num-traits = { version = "0.2.8", default-features = false }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../std" }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 sp-debug-derive = { version = "3.0.0", default-features = false, path = "../debug-derive" }
 
 [dev-dependencies]
diff --git a/substrate/primitives/consensus/babe/Cargo.toml b/substrate/primitives/consensus/babe/Cargo.toml
index aa5f29db0d..264bc1a654 100644
--- a/substrate/primitives/consensus/babe/Cargo.toml
+++ b/substrate/primitives/consensus/babe/Cargo.toml
@@ -26,7 +26,7 @@ sp-inherents = { version = "4.0.0-dev", default-features = false, path = "../../
 sp-keystore = { version = "0.10.0-dev", default-features = false, path = "../../keystore", optional = true }
 sp-runtime = { version = "4.0.0-dev", default-features = false, path = "../../runtime" }
 sp-timestamp = { version = "4.0.0-dev", path = "../../timestamp", optional = true }
-serde = { version = "1.0.123", features = ["derive"], optional = true }
+serde = { version = "1.0.126", features = ["derive"], optional = true }
 async-trait = { version = "0.1.48", optional = true }
 
 [features]
diff --git a/substrate/primitives/core/Cargo.toml b/substrate/primitives/core/Cargo.toml
index e3b5613e06..711fcc37e8 100644
--- a/substrate/primitives/core/Cargo.toml
+++ b/substrate/primitives/core/Cargo.toml
@@ -16,7 +16,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../std" }
 codec = { package = "parity-scale-codec", version = "2.2.0", default-features = false, features = ["derive", "max-encoded-len"] }
 log = { version = "0.4.11", default-features = false }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 byteorder = { version = "1.3.2", default-features = false }
 primitive-types = { version = "0.10.0", default-features = false, features = ["codec"] }
 impl-serde = { version = "0.3.0", optional = true }
diff --git a/substrate/primitives/finality-grandpa/Cargo.toml b/substrate/primitives/finality-grandpa/Cargo.toml
index 57a977f617..895270d012 100644
--- a/substrate/primitives/finality-grandpa/Cargo.toml
+++ b/substrate/primitives/finality-grandpa/Cargo.toml
@@ -18,7 +18,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 grandpa = { package = "finality-grandpa", version = "0.14.1", default-features = false, features = ["derive-codec"] }
 log = { version = "0.4.8", optional = true }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 sp-api = { version = "4.0.0-dev", default-features = false, path = "../api" }
 sp-application-crypto = { version = "4.0.0-dev", default-features = false, path = "../application-crypto" }
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../core" }
diff --git a/substrate/primitives/npos-elections/Cargo.toml b/substrate/primitives/npos-elections/Cargo.toml
index 02e898051d..902b3040ba 100644
--- a/substrate/primitives/npos-elections/Cargo.toml
+++ b/substrate/primitives/npos-elections/Cargo.toml
@@ -14,7 +14,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../std" }
 sp-npos-elections-compact = { version = "4.0.0-dev", path = "./compact" }
 sp-arithmetic = { version = "4.0.0-dev", default-features = false, path = "../arithmetic" }
diff --git a/substrate/primitives/rpc/Cargo.toml b/substrate/primitives/rpc/Cargo.toml
index e740d0be88..227fc0fb9f 100644
--- a/substrate/primitives/rpc/Cargo.toml
+++ b/substrate/primitives/rpc/Cargo.toml
@@ -13,7 +13,7 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 sp-core = { version = "4.0.0-dev", path = "../core" }
 tracing-core = "0.1.17"
 rustc-hash = "1.1.0"
diff --git a/substrate/primitives/runtime/Cargo.toml b/substrate/primitives/runtime/Cargo.toml
index 78d141edb1..ad4b047718 100644
--- a/substrate/primitives/runtime/Cargo.toml
+++ b/substrate/primitives/runtime/Cargo.toml
@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 
 [dependencies]
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "2.2.0", default-features = false, features = ["derive", "max-encoded-len"] }
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../core" }
 sp-application-crypto = { version = "4.0.0-dev", default-features = false, path = "../application-crypto" }
diff --git a/substrate/primitives/serializer/Cargo.toml b/substrate/primitives/serializer/Cargo.toml
index 51b53b43a4..8f03d8f972 100644
--- a/substrate/primitives/serializer/Cargo.toml
+++ b/substrate/primitives/serializer/Cargo.toml
@@ -14,5 +14,5 @@ readme = "README.md"
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
-serde = "1.0.101"
+serde = "1.0.126"
 serde_json = "1.0.41"
diff --git a/substrate/primitives/storage/Cargo.toml b/substrate/primitives/storage/Cargo.toml
index 40566deb06..1a05fb9969 100644
--- a/substrate/primitives/storage/Cargo.toml
+++ b/substrate/primitives/storage/Cargo.toml
@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../std" }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 impl-serde = { version = "0.3.1", optional = true }
 ref-cast = "1.0.0"
 sp-debug-derive = { version = "3.0.0", path = "../debug-derive" }
diff --git a/substrate/primitives/test-primitives/Cargo.toml b/substrate/primitives/test-primitives/Cargo.toml
index c7b901e848..5aed5d679d 100644
--- a/substrate/primitives/test-primitives/Cargo.toml
+++ b/substrate/primitives/test-primitives/Cargo.toml
@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 sp-application-crypto = { version = "4.0.0-dev", default-features = false, path = "../application-crypto" }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-core = { version = "4.0.0-dev", default-features = false, path = "../core" }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 sp-runtime = { version = "4.0.0-dev", default-features = false, path = "../runtime" }
 parity-util-mem = { version = "0.10.0", default-features = false, features = ["primitive-types"] }
 
diff --git a/substrate/primitives/tracing/Cargo.toml b/substrate/primitives/tracing/Cargo.toml
index d5fb07ad07..451da77a81 100644
--- a/substrate/primitives/tracing/Cargo.toml
+++ b/substrate/primitives/tracing/Cargo.toml
@@ -26,7 +26,7 @@ log = { version = "0.4.8", optional = true }
 tracing-subscriber = { version = "0.2.18", optional = true, features = ["tracing-log"] }
 parking_lot = { version = "0.10.0", optional = true }
 erased-serde = { version = "0.3.9", optional = true }
-serde = { version = "1.0.101", optional = true }
+serde = { version = "1.0.126", optional = true }
 serde_json = { version = "1.0.41", optional = true }
 slog = { version = "2.5.2", features = ["nested-values"], optional = true }
 
diff --git a/substrate/primitives/version/Cargo.toml b/substrate/primitives/version/Cargo.toml
index 62f625d1e3..1cd3e7c724 100644
--- a/substrate/primitives/version/Cargo.toml
+++ b/substrate/primitives/version/Cargo.toml
@@ -16,7 +16,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 impl-serde = { version = "0.3.1", optional = true }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
 sp-std = { version = "4.0.0-dev", default-features = false, path = "../std" }
 sp-runtime = { version = "4.0.0-dev", default-features = false, path = "../runtime" }
diff --git a/substrate/test-utils/client/Cargo.toml b/substrate/test-utils/client/Cargo.toml
index 26661b8209..99dbb6cd2a 100644
--- a/substrate/test-utils/client/Cargo.toml
+++ b/substrate/test-utils/client/Cargo.toml
@@ -17,7 +17,7 @@ futures = "0.3.9"
 futures01 = { package = "futures", version = "0.1.29" }
 hash-db = "0.15.2"
 hex = "0.4"
-serde = "1.0.55"
+serde = "1.0.126"
 serde_json = "1.0.55"
 sc-client-api = { version = "4.0.0-dev", path = "../../client/api" }
 sc-client-db = { version = "0.10.0-dev", features = ["test-helpers"], path = "../../client/db" }
diff --git a/substrate/test-utils/runtime/Cargo.toml b/substrate/test-utils/runtime/Cargo.toml
index 371f2fd5a1..2a4be6787d 100644
--- a/substrate/test-utils/runtime/Cargo.toml
+++ b/substrate/test-utils/runtime/Cargo.toml
@@ -47,7 +47,7 @@ sp-externalities = { version = "0.10.0-dev", default-features = false, path = ".
 # 3rd party
 cfg-if = "1.0"
 log = { version = "0.4.14", default-features = false }
-serde = { version = "1.0.101", optional = true, features = ["derive"] }
+serde = { version = "1.0.126", optional = true, features = ["derive"] }
 
 [dev-dependencies]
 sc-block-builder = { version = "0.10.0-dev", path = "../../client/block-builder" }
diff --git a/substrate/utils/frame/benchmarking-cli/Cargo.toml b/substrate/utils/frame/benchmarking-cli/Cargo.toml
index d6f8da089f..9bae971019 100644
--- a/substrate/utils/frame/benchmarking-cli/Cargo.toml
+++ b/substrate/utils/frame/benchmarking-cli/Cargo.toml
@@ -27,7 +27,7 @@ sp-state-machine = { version = "0.10.0-dev", path = "../../../primitives/state-m
 codec = { version = "2.0.0", package = "parity-scale-codec" }
 structopt = "0.3.8"
 chrono = "0.4"
-serde = "1.0.116"
+serde = "1.0.126"
 handlebars = "3.5.0"
 Inflector = "0.11.4"
 
diff --git a/substrate/utils/frame/remote-externalities/Cargo.toml b/substrate/utils/frame/remote-externalities/Cargo.toml
index 3f51b00dd6..392eccf64b 100644
--- a/substrate/utils/frame/remote-externalities/Cargo.toml
+++ b/substrate/utils/frame/remote-externalities/Cargo.toml
@@ -21,7 +21,7 @@ env_logger = "0.8.2"
 log = "0.4.11"
 codec = { package = "parity-scale-codec", version = "2.0.0" }
 serde_json = "1.0"
-serde = "1.0.0"
+serde = "1.0.126"
 
 sp-io = { version = "4.0.0-dev", path = "../../../primitives/io" }
 sp-core = { version = "4.0.0-dev", path = "../../../primitives/core" }
diff --git a/substrate/utils/frame/rpc/system/Cargo.toml b/substrate/utils/frame/rpc/system/Cargo.toml
index 503d8d86e4..909da94624 100644
--- a/substrate/utils/frame/rpc/system/Cargo.toml
+++ b/substrate/utils/frame/rpc/system/Cargo.toml
@@ -20,7 +20,7 @@ jsonrpc-core = "15.1.0"
 jsonrpc-core-client = "15.1.0"
 jsonrpc-derive = "15.1.0"
 log = "0.4.8"
-serde = { version = "1.0.101", features = ["derive"] }
+serde = { version = "1.0.126", features = ["derive"] }
 sp-runtime = { version = "4.0.0-dev", path = "../../../../primitives/runtime" }
 sp-api = { version = "4.0.0-dev", path = "../../../../primitives/api" }
 frame-system-rpc-runtime-api = { version = "4.0.0-dev", path = "../../../../frame/system/rpc/runtime-api" }
diff --git a/substrate/utils/frame/try-runtime/cli/Cargo.toml b/substrate/utils/frame/try-runtime/cli/Cargo.toml
index 61bfe9290a..827239e290 100644
--- a/substrate/utils/frame/try-runtime/cli/Cargo.toml
+++ b/substrate/utils/frame/try-runtime/cli/Cargo.toml
@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 log = "0.4.8"
 parity-scale-codec = { version = "2.0.0" }
-serde = "1.0.0"
+serde = "1.0.126"
 structopt = "0.3.8"
 
 sc-service = { version = "0.10.0-dev", default-features = false, path = "../../../../client/service" }