diff --git a/Cargo.lock b/Cargo.lock
index cc6b80221b259..d5e242cc22c94 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1368,7 +1368,7 @@ checksum = "22813a6dc45b335f9bade10bf7271dc477e81113e89eb251a0bc2a8a81c536e1"
 dependencies = [
  "bstr",
  "csv-core",
- "itoa",
+ "itoa 0.4.8",
  "ryu",
  "serde",
 ]
@@ -2731,7 +2731,7 @@ checksum = "7245cd7449cc792608c3c8a9eaf69bd4eabbabf802713748fd739c98b82f0747"
 dependencies = [
  "bytes 1.1.0",
  "fnv",
- "itoa",
+ "itoa 0.4.8",
 ]
 
 [[package]]
@@ -2806,7 +2806,7 @@ dependencies = [
  "http-body",
  "httparse",
  "httpdate",
- "itoa",
+ "itoa 0.4.8",
  "pin-project-lite 0.2.6",
  "socket2 0.4.0",
  "tokio",
@@ -3026,6 +3026,12 @@ version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
 
+[[package]]
+name = "itoa"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
+
 [[package]]
 name = "jobserver"
 version = "0.1.21"
@@ -4968,7 +4974,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bafe4179722c2894288ee77a9f044f02811c86af699344c498b0840c698a2465"
 dependencies = [
  "arrayvec 0.4.12",
- "itoa",
+ "itoa 0.4.8",
 ]
 
 [[package]]
@@ -5076,7 +5082,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7337d80c23c2d8b1349563981bc4fb531220733743ba8115454a67b181173f0d"
 dependencies = [
  "dtoa",
- "itoa",
+ "itoa 0.4.8",
  "open-metrics-client-derive-text-encode",
  "owning_ref",
 ]
@@ -7459,7 +7465,7 @@ dependencies = [
  "cc",
  "errno",
  "io-lifetimes",
- "itoa",
+ "itoa 0.4.8",
  "libc",
  "linux-raw-sys",
  "once_cell",
@@ -8938,11 +8944,11 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.71"
+version = "1.0.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "063bf466a64011ac24040a49009724ee60a57da1b437617ceb32e53ad61bfb19"
+checksum = "ee2bb9cd061c5865d345bb02ca49fcef1391741b672b54a0bf7b679badec3142"
 dependencies = [
- "itoa",
+ "itoa 1.0.1",
  "ryu",
  "serde",
 ]
diff --git a/bin/node/bench/Cargo.toml b/bin/node/bench/Cargo.toml
index 114742990bcdc..90951d75cfd21 100644
--- a/bin/node/bench/Cargo.toml
+++ b/bin/node/bench/Cargo.toml
@@ -17,7 +17,7 @@ sc-client-api = { version = "4.0.0-dev", path = "../../../client/api/" }
 sp-runtime = { version = "4.0.0", path = "../../../primitives/runtime" }
 sp-state-machine = { version = "0.10.0", path = "../../../primitives/state-machine" }
 serde = "1.0.132"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 structopt = "0.3"
 derive_more = "0.99.16"
 kvdb = "0.10.0"
diff --git a/client/beefy/rpc/Cargo.toml b/client/beefy/rpc/Cargo.toml
index c14d604990cbf..bc81732dcd41d 100644
--- a/client/beefy/rpc/Cargo.toml
+++ b/client/beefy/rpc/Cargo.toml
@@ -28,7 +28,7 @@ beefy-gadget = { version = "4.0.0-dev", path = "../." }
 beefy-primitives = { version = "4.0.0-dev", path = "../../../primitives/beefy" }
 
 [dev-dependencies]
-serde_json = "1.0.50"
+serde_json = "1.0.74"
 
 sc-rpc = { version = "4.0.0-dev", path = "../../rpc", features = [
     "test-helpers",
diff --git a/client/chain-spec/Cargo.toml b/client/chain-spec/Cargo.toml
index 601fb5b4da9e9..769f502dd5ed2 100644
--- a/client/chain-spec/Cargo.toml
+++ b/client/chain-spec/Cargo.toml
@@ -18,7 +18,7 @@ impl-trait-for-tuples = "0.2.1"
 sc-network = { version = "0.10.0-dev", path = "../network" }
 sp-core = { version = "4.1.0-dev", path = "../../primitives/core" }
 serde = { version = "1.0.132", features = ["derive"] }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sp-runtime = { version = "4.0.0", path = "../../primitives/runtime" }
 sc-telemetry = { version = "4.0.0-dev", path = "../telemetry" }
 codec = { package = "parity-scale-codec", version = "2.0.0" }
diff --git a/client/cli/Cargo.toml b/client/cli/Cargo.toml
index f92f7b51c8b7f..7ef5ef9d68932 100644
--- a/client/cli/Cargo.toml
+++ b/client/cli/Cargo.toml
@@ -23,7 +23,7 @@ parity-scale-codec = "2.3.1"
 hex = "0.4.2"
 rand = "0.7.3"
 tiny-bip39 = "0.8.2"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sc-keystore = { version = "4.0.0-dev", path = "../keystore" }
 sp-panic-handler = { version = "4.0.0", path = "../../primitives/panic-handler" }
 sc-client-api = { version = "4.0.0-dev", path = "../api" }
diff --git a/client/consensus/babe/rpc/Cargo.toml b/client/consensus/babe/rpc/Cargo.toml
index 61321e684fa9e..dbc840d26c57c 100644
--- a/client/consensus/babe/rpc/Cargo.toml
+++ b/client/consensus/babe/rpc/Cargo.toml
@@ -33,7 +33,7 @@ sp-keystore = { version = "0.10.0", path = "../../../../primitives/keystore" }
 
 [dev-dependencies]
 sc-consensus = { version = "0.10.0-dev", path = "../../../consensus/common" }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sp-keyring = { version = "4.0.0-dev", path = "../../../../primitives/keyring" }
 sc-keystore = { version = "4.0.0-dev", path = "../../../keystore" }
 substrate-test-runtime-client = { version = "2.0.0", path = "../../../../test-utils/runtime/client" }
diff --git a/client/finality-grandpa/Cargo.toml b/client/finality-grandpa/Cargo.toml
index 6e7463792e7b4..10344e09c6858 100644
--- a/client/finality-grandpa/Cargo.toml
+++ b/client/finality-grandpa/Cargo.toml
@@ -35,7 +35,7 @@ sp-keystore = { version = "0.10.0", path = "../../primitives/keystore" }
 sp-api = { version = "4.0.0-dev", path = "../../primitives/api" }
 sc-telemetry = { version = "4.0.0-dev", path = "../telemetry" }
 sc-keystore = { version = "4.0.0-dev", path = "../keystore" }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sc-client-api = { version = "4.0.0-dev", path = "../api" }
 sp-blockchain = { version = "4.0.0-dev", path = "../../primitives/blockchain" }
 sc-network = { version = "0.10.0-dev", path = "../network" }
diff --git a/client/keystore/Cargo.toml b/client/keystore/Cargo.toml
index b4c684a206f30..7fe9e182efbdf 100644
--- a/client/keystore/Cargo.toml
+++ b/client/keystore/Cargo.toml
@@ -22,7 +22,7 @@ sp-core = { version = "4.1.0-dev", path = "../../primitives/core" }
 sp-keystore = { version = "0.10.0", path = "../../primitives/keystore" }
 hex = "0.4.0"
 parking_lot = "0.11.2"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 
 [dev-dependencies]
 tempfile = "3.1.0"
diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml
index 1a77431b4b743..d5304cf5fbf0b 100644
--- a/client/network/Cargo.toml
+++ b/client/network/Cargo.toml
@@ -47,7 +47,7 @@ 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 = "1.0.132", features = ["derive"] }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 smallvec = "1.7.0"
 sp-arithmetic = { version = "4.0.0", path = "../../primitives/arithmetic" }
 sp-blockchain = { version = "4.0.0-dev", path = "../../primitives/blockchain" }
diff --git a/client/peerset/Cargo.toml b/client/peerset/Cargo.toml
index ec226b3d9bee2..ac3590630a1eb 100644
--- a/client/peerset/Cargo.toml
+++ b/client/peerset/Cargo.toml
@@ -18,7 +18,7 @@ futures = "0.3.9"
 libp2p = { version = "0.40.0", default-features = false }
 sc-utils = { version = "4.0.0-dev", path = "../utils"}
 log = "0.4.8"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 wasm-timer = "0.2"
 
 [dev-dependencies]
diff --git a/client/rpc-api/Cargo.toml b/client/rpc-api/Cargo.toml
index f8f8e333a9c68..aa560bc2e1c13 100644
--- a/client/rpc-api/Cargo.toml
+++ b/client/rpc-api/Cargo.toml
@@ -28,7 +28,7 @@ sp-version = { version = "4.0.0-dev", path = "../../primitives/version" }
 sp-runtime = { path = "../../primitives/runtime", version = "4.0.0" }
 sc-chain-spec = { path = "../chain-spec", version = "4.0.0-dev" }
 serde = { version = "1.0.132", features = ["derive"] }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sc-transaction-pool-api = { version = "4.0.0-dev", path = "../transaction-pool/api" }
 sp-rpc = { version = "4.0.0-dev", path = "../../primitives/rpc" }
 sp-tracing = { version = "4.0.0", path = "../../primitives/tracing" }
diff --git a/client/rpc-servers/Cargo.toml b/client/rpc-servers/Cargo.toml
index ae450c2ba9a22..4246168c3e66c 100644
--- a/client/rpc-servers/Cargo.toml
+++ b/client/rpc-servers/Cargo.toml
@@ -18,7 +18,7 @@ jsonrpc-core = "18.0.0"
 pubsub = { package = "jsonrpc-pubsub", version = "18.0.0" }
 log = "0.4.8"
 prometheus-endpoint = { package = "substrate-prometheus-endpoint", path = "../../utils/prometheus", version = "0.10.0-dev"}
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 tokio = "1.15"
 http = { package = "jsonrpc-http-server", version = "18.0.0" }
 ipc = { package = "jsonrpc-ipc-server", version = "18.0.0" }
diff --git a/client/rpc/Cargo.toml b/client/rpc/Cargo.toml
index b8829dca870b3..3a2af0bb211ec 100644
--- a/client/rpc/Cargo.toml
+++ b/client/rpc/Cargo.toml
@@ -23,7 +23,7 @@ log = "0.4.8"
 sp-core = { version = "4.1.0-dev", path = "../../primitives/core" }
 rpc = { package = "jsonrpc-core", version = "18.0.0" }
 sp-version = { version = "4.0.0-dev", path = "../../primitives/version" }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sp-session = { version = "4.0.0-dev", path = "../../primitives/session" }
 sp-offchain = { version = "4.0.0-dev", path = "../../primitives/offchain" }
 sp-runtime = { version = "4.0.0", path = "../../primitives/runtime" }
diff --git a/client/service/Cargo.toml b/client/service/Cargo.toml
index bfe053152ba4b..84e24634613ff 100644
--- a/client/service/Cargo.toml
+++ b/client/service/Cargo.toml
@@ -34,7 +34,7 @@ exit-future = "0.2.0"
 pin-project = "1.0.8"
 hash-db = "0.15.2"
 serde = "1.0.132"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sc-keystore = { version = "4.0.0-dev", path = "../keystore" }
 sp-runtime = { version = "4.0.0", path = "../../primitives/runtime" }
 sp-trie = { version = "4.0.0", path = "../../primitives/trie" }
diff --git a/client/sync-state-rpc/Cargo.toml b/client/sync-state-rpc/Cargo.toml
index 859173ca77eb8..e5ac6550d2136 100644
--- a/client/sync-state-rpc/Cargo.toml
+++ b/client/sync-state-rpc/Cargo.toml
@@ -23,7 +23,7 @@ sc-consensus-babe = { version = "0.10.0-dev", path = "../consensus/babe" }
 sc-consensus-epochs = { version = "0.10.0-dev", path = "../consensus/epochs" }
 sc-finality-grandpa = { version = "0.10.0-dev", path = "../finality-grandpa" }
 sc-rpc-api = { version = "0.10.0-dev", path = "../rpc-api" }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 serde = { version = "1.0.132", features = ["derive"] }
 sp-blockchain = { version = "4.0.0-dev", path = "../../primitives/blockchain" }
 sp-runtime = { version = "4.0.0", path = "../../primitives/runtime" }
diff --git a/client/telemetry/Cargo.toml b/client/telemetry/Cargo.toml
index 2001026a1201f..4e9a1f8938a9b 100644
--- a/client/telemetry/Cargo.toml
+++ b/client/telemetry/Cargo.toml
@@ -23,6 +23,6 @@ log = "0.4.8"
 pin-project = "1.0.8"
 rand = "0.7.2"
 serde = { version = "1.0.132", features = ["derive"] }
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 chrono = "0.4.19"
 thiserror = "1.0.30"
diff --git a/frame/merkle-mountain-range/rpc/Cargo.toml b/frame/merkle-mountain-range/rpc/Cargo.toml
index c6f9124c2a275..cf6aee670b5b4 100644
--- a/frame/merkle-mountain-range/rpc/Cargo.toml
+++ b/frame/merkle-mountain-range/rpc/Cargo.toml
@@ -27,4 +27,4 @@ sp-runtime = { version = "4.0.0", path = "../../../primitives/runtime" }
 pallet-mmr-primitives = { version = "4.0.0-dev", path = "../primitives" }
 
 [dev-dependencies]
-serde_json = "1.0.71"
+serde_json = "1.0.74"
diff --git a/frame/transaction-payment/Cargo.toml b/frame/transaction-payment/Cargo.toml
index 7679dae8e6ea9..9cf6790de46d8 100644
--- a/frame/transaction-payment/Cargo.toml
+++ b/frame/transaction-payment/Cargo.toml
@@ -29,7 +29,7 @@ frame-support = { version = "4.0.0-dev", default-features = false, path = "../su
 frame-system = { version = "4.0.0-dev", default-features = false, path = "../system" }
 
 [dev-dependencies]
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 pallet-balances = { version = "4.0.0-dev", path = "../balances" }
 
 [features]
diff --git a/frame/transaction-payment/asset-tx-payment/Cargo.toml b/frame/transaction-payment/asset-tx-payment/Cargo.toml
index 3226ec09d0145..820c8f00bb8f0 100644
--- a/frame/transaction-payment/asset-tx-payment/Cargo.toml
+++ b/frame/transaction-payment/asset-tx-payment/Cargo.toml
@@ -30,7 +30,7 @@ serde = { version = "1.0.132", optional = true }
 
 [dev-dependencies]
 smallvec = "1.7.0"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 
 sp-storage = { version = "4.0.0", default-features = false, path = "../../../primitives/storage" }
 
diff --git a/primitives/rpc/Cargo.toml b/primitives/rpc/Cargo.toml
index 51aaa990456e9..52fe09b2c7894 100644
--- a/primitives/rpc/Cargo.toml
+++ b/primitives/rpc/Cargo.toml
@@ -18,4 +18,4 @@ sp-core = { version = "4.1.0-dev", path = "../core" }
 rustc-hash = "1.1.0"
 
 [dev-dependencies]
-serde_json = "1.0.71"
+serde_json = "1.0.74"
diff --git a/primitives/runtime/Cargo.toml b/primitives/runtime/Cargo.toml
index deb877abcca08..abf246eece9a0 100644
--- a/primitives/runtime/Cargo.toml
+++ b/primitives/runtime/Cargo.toml
@@ -32,7 +32,7 @@ hash256-std-hasher = { version = "0.15.2", default-features = false }
 either = { version = "1.5", default-features = false }
 
 [dev-dependencies]
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 rand = "0.7.2"
 sp-state-machine = { version = "0.10.0", path = "../state-machine" }
 sp-api = { version = "4.0.0-dev", path = "../api" }
diff --git a/primitives/serializer/Cargo.toml b/primitives/serializer/Cargo.toml
index 40f4d19e047eb..a0413164eb57a 100644
--- a/primitives/serializer/Cargo.toml
+++ b/primitives/serializer/Cargo.toml
@@ -15,4 +15,4 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 serde = "1.0.132"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
diff --git a/test-utils/client/Cargo.toml b/test-utils/client/Cargo.toml
index fa0ae85e706c4..cb9f17f637dda 100644
--- a/test-utils/client/Cargo.toml
+++ b/test-utils/client/Cargo.toml
@@ -16,7 +16,7 @@ codec = { package = "parity-scale-codec", version = "2.0.0" }
 futures = "0.3.16"
 hex = "0.4"
 serde = "1.0.132"
-serde_json = "1.0.71"
+serde_json = "1.0.74"
 sc-client-api = { version = "4.0.0-dev", path = "../../client/api" }
 sc-client-db = { version = "0.10.0-dev", features = [
     "test-helpers",