diff --git a/bridges/relays/ethereum/Cargo.toml b/bridges/relays/ethereum/Cargo.toml
index d2e5758fe8884..742c1e3bc802e 100644
--- a/bridges/relays/ethereum/Cargo.toml
+++ b/bridges/relays/ethereum/Cargo.toml
@@ -26,7 +26,7 @@ parity-crypto = { version = "0.6", features = ["publickey"] }
 parking_lot = "0.11.0"
 rustc-hex = "2.0.1"
 serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0.55"
+serde_json = "1.0.56"
 sp-bridge-eth-poa = { path = "../../primitives/ethereum-poa" }
 time = "0.2"
 web3 = { version = "0.12.0", default-features = false }
diff --git a/bridges/relays/substrate/Cargo.toml b/bridges/relays/substrate/Cargo.toml
index e8052b5b1d919..e391a18901b36 100644
--- a/bridges/relays/substrate/Cargo.toml
+++ b/bridges/relays/substrate/Cargo.toml
@@ -14,7 +14,7 @@ env_logger = "0.7.1"
 futures = "0.3.5"
 jsonrpsee = { git = "https://github.com/paritytech/jsonrpsee", features = ["ws"] }
 log = "0.4.8"
-serde_json = "1.0.55"
+serde_json = "1.0.56"
 url = "2.1.0"
 
 [dependencies.sp-core]