diff --git a/Cargo.lock b/Cargo.lock
index f12caae0140..d789bcd72e8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -12849,18 +12849,18 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.164"
+version = "1.0.166"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e8c8cf938e98f769bc164923b06dce91cea1751522f46f8466461af04c9027d"
+checksum = "d01b7404f9d441d3ad40e6a636a7782c377d2abdbe4fa2440e2edcc2f4f10db8"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.164"
+version = "1.0.166"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9735b638ccc51c28bf6914d90a2e9725b377144fc612c49a611fddd1b631d68"
+checksum = "5dd83d6dde2b6b2d466e14d9d1acce8816dedee94f735eac6395808b3483c6d6"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/client/relay-chain-rpc-interface/Cargo.toml b/client/relay-chain-rpc-interface/Cargo.toml
index 24da6507b83..c52122d88e1 100644
--- a/client/relay-chain-rpc-interface/Cargo.toml
+++ b/client/relay-chain-rpc-interface/Cargo.toml
@@ -31,5 +31,5 @@ tracing = "0.1.37"
 async-trait = "0.1.68"
 url = "2.4.0"
 serde_json = "1.0.99"
-serde = "1.0.164"
+serde = "1.0.166"
 lru = "0.9.0"
diff --git a/parachain-template/node/Cargo.toml b/parachain-template/node/Cargo.toml
index 507f66ab8d4..3799e96abff 100644
--- a/parachain-template/node/Cargo.toml
+++ b/parachain-template/node/Cargo.toml
@@ -13,7 +13,7 @@ build = "build.rs"
 clap = { version = "4.3.10", features = ["derive"] }
 log = "0.4.19"
 codec = { package = "parity-scale-codec", version = "3.0.0" }
-serde = { version = "1.0.164", features = ["derive"] }
+serde = { version = "1.0.166", features = ["derive"] }
 jsonrpsee = { version = "0.16.2", features = ["server"] }
 
 # Local
diff --git a/parachains/runtimes/bridge-hubs/bridge-hub-kusama/Cargo.toml b/parachains/runtimes/bridge-hubs/bridge-hub-kusama/Cargo.toml
index e13f7139bd1..b6deae3cee6 100644
--- a/parachains/runtimes/bridge-hubs/bridge-hub-kusama/Cargo.toml
+++ b/parachains/runtimes/bridge-hubs/bridge-hub-kusama/Cargo.toml
@@ -13,7 +13,7 @@ codec = { package = "parity-scale-codec", version = "3.0.0", default-features =
 hex-literal = { version = "0.4.1" }
 log = { version = "0.4.19", default-features = false }
 scale-info = { version = "2.9.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.164", optional = true, features = ["derive"] }
+serde = { version = "1.0.166", optional = true, features = ["derive"] }
 smallvec = "1.8.1"
 
 # Substrate
diff --git a/parachains/runtimes/bridge-hubs/bridge-hub-polkadot/Cargo.toml b/parachains/runtimes/bridge-hubs/bridge-hub-polkadot/Cargo.toml
index 28784a9b463..2fc1f2e9a13 100644
--- a/parachains/runtimes/bridge-hubs/bridge-hub-polkadot/Cargo.toml
+++ b/parachains/runtimes/bridge-hubs/bridge-hub-polkadot/Cargo.toml
@@ -13,7 +13,7 @@ codec = { package = "parity-scale-codec", version = "3.0.0", default-features =
 hex-literal = { version = "0.4.1" }
 log = { version = "0.4.19", default-features = false }
 scale-info = { version = "2.9.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.164", optional = true, features = ["derive"] }
+serde = { version = "1.0.166", optional = true, features = ["derive"] }
 smallvec = "1.8.1"
 
 # Substrate
diff --git a/parachains/runtimes/bridge-hubs/bridge-hub-rococo/Cargo.toml b/parachains/runtimes/bridge-hubs/bridge-hub-rococo/Cargo.toml
index 4997d97ba93..9e3ff95860e 100644
--- a/parachains/runtimes/bridge-hubs/bridge-hub-rococo/Cargo.toml
+++ b/parachains/runtimes/bridge-hubs/bridge-hub-rococo/Cargo.toml
@@ -13,7 +13,7 @@ codec = { package = "parity-scale-codec", version = "3.0.0", default-features =
 hex-literal = { version = "0.4.1" }
 log = { version = "0.4.19", default-features = false }
 scale-info = { version = "2.9.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.164", optional = true, features = ["derive"] }
+serde = { version = "1.0.166", optional = true, features = ["derive"] }
 smallvec = "1.8.1"
 
 # Substrate
diff --git a/polkadot-parachain/Cargo.toml b/polkadot-parachain/Cargo.toml
index f079788decb..50b853c185a 100644
--- a/polkadot-parachain/Cargo.toml
+++ b/polkadot-parachain/Cargo.toml
@@ -17,7 +17,7 @@ codec = { package = "parity-scale-codec", version = "3.0.0" }
 futures = "0.3.28"
 hex-literal = "0.4.1"
 log = "0.4.19"
-serde = { version = "1.0.164", features = ["derive"] }
+serde = { version = "1.0.166", features = ["derive"] }
 serde_json = "1.0.99"
 
 # Local
diff --git a/test/service/Cargo.toml b/test/service/Cargo.toml
index d4ecc2e4408..8da129be2af 100644
--- a/test/service/Cargo.toml
+++ b/test/service/Cargo.toml
@@ -15,7 +15,7 @@ codec = { package = "parity-scale-codec", version = "3.0.0" }
 criterion = { version = "0.5.1", features = [ "async_tokio" ] }
 jsonrpsee = { version = "0.16.2", features = ["server"] }
 rand = "0.8.5"
-serde = { version = "1.0.164", features = ["derive"] }
+serde = { version = "1.0.166", features = ["derive"] }
 tokio = { version = "1.29.1", features = ["macros"] }
 tracing = "0.1.37"
 url = "2.4.0"