diff --git a/Cargo.lock b/Cargo.lock
index 7336b5399..471aa6c0e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4060,9 +4060,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.166"
+version = "1.0.168"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d01b7404f9d441d3ad40e6a636a7782c377d2abdbe4fa2440e2edcc2f4f10db8"
+checksum = "d614f89548720367ded108b3c843be93f3a341e22d5674ca0dd5cd57f34926af"
 dependencies = [
  "serde_derive",
 ]
@@ -4078,9 +4078,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.166"
+version = "1.0.168"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5dd83d6dde2b6b2d466e14d9d1acce8816dedee94f735eac6395808b3483c6d6"
+checksum = "d4fe589678c688e44177da4f27152ee2d190757271dc7f1d5b6b9f68d869d641"
 dependencies = [
  "proc-macro2 1.0.63",
  "quote 1.0.29",
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index dd8c91dab..95acadbaf 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -90,7 +90,7 @@ tracing = "0.1.37"
 
 # Serialization
 hex = { version = "0.4.3", features = ["serde"] }
-serde = { version = "1.0.166", features = ["serde_derive", "rc"] }
+serde = { version = "1.0.168", features = ["serde_derive", "rc"] }
 serde_with = "3.0.0"
 serde-big-array = "0.5.1"
 
diff --git a/zebra-consensus/Cargo.toml b/zebra-consensus/Cargo.toml
index 4e825ccc8..639a27de3 100644
--- a/zebra-consensus/Cargo.toml
+++ b/zebra-consensus/Cargo.toml
@@ -47,7 +47,7 @@ chrono = { version = "0.4.26", default-features = false, features = ["clock", "s
 displaydoc = "0.2.4"
 lazy_static = "1.4.0"
 once_cell = "1.18.0"
-serde = { version = "1.0.166", features = ["serde_derive"] }
+serde = { version = "1.0.168", features = ["serde_derive"] }
 
 futures = "0.3.28"
 futures-util = "0.3.28"
diff --git a/zebra-network/Cargo.toml b/zebra-network/Cargo.toml
index d0c6bc80f..a1cfb0af2 100644
--- a/zebra-network/Cargo.toml
+++ b/zebra-network/Cargo.toml
@@ -56,7 +56,7 @@ pin-project = "1.1.2"
 rand = "0.8.5"
 rayon = "1.7.0"
 regex = "1.8.4"
-serde = { version = "1.0.166", features = ["serde_derive"] }
+serde = { version = "1.0.168", features = ["serde_derive"] }
 tempfile = "3.5.0"
 thiserror = "1.0.43"
 
diff --git a/zebra-node-services/Cargo.toml b/zebra-node-services/Cargo.toml
index 444710708..694636b95 100644
--- a/zebra-node-services/Cargo.toml
+++ b/zebra-node-services/Cargo.toml
@@ -44,7 +44,7 @@ color-eyre = { version = "0.6.2", optional = true }
 jsonrpc-core = { version = "18.0.0", optional = true }
 # Security: avoid default dependency on openssl
 reqwest = { version = "0.11.18", default-features = false, features = ["rustls-tls"], optional = true }
-serde = { version = "1.0.166", optional = true }
+serde = { version = "1.0.168", optional = true }
 serde_json = { version = "1.0.100", optional = true }
 
 [dev-dependencies]
@@ -52,5 +52,5 @@ serde_json = { version = "1.0.100", optional = true }
 color-eyre = "0.6.2"
 jsonrpc-core = "18.0.0"
 reqwest = { version = "0.11.18", default-features = false, features = ["rustls-tls"] }
-serde = "1.0.166"
+serde = "1.0.168"
 serde_json = "1.0.100"
diff --git a/zebra-rpc/Cargo.toml b/zebra-rpc/Cargo.toml
index 742a764c2..c387f31cf 100644
--- a/zebra-rpc/Cargo.toml
+++ b/zebra-rpc/Cargo.toml
@@ -60,7 +60,7 @@ tower = "0.4.13"
 tracing = "0.1.37"
 
 hex = { version = "0.4.3", features = ["serde"] }
-serde = { version = "1.0.166", features = ["serde_derive"] }
+serde = { version = "1.0.168", features = ["serde_derive"] }
 
 # Experimental feature getblocktemplate-rpcs
 rand = { version = "0.8.5", optional = true }
diff --git a/zebra-state/Cargo.toml b/zebra-state/Cargo.toml
index f91dc582d..19a111616 100644
--- a/zebra-state/Cargo.toml
+++ b/zebra-state/Cargo.toml
@@ -57,7 +57,7 @@ regex = "1.8.4"
 rlimit = "0.10.0"
 rocksdb = { version = "0.21.0", default-features = false, features = ["lz4"] }
 semver = "1.0.17"
-serde = { version = "1.0.166", features = ["serde_derive"] }
+serde = { version = "1.0.168", features = ["serde_derive"] }
 tempfile = "3.5.0"
 thiserror = "1.0.43"
 
diff --git a/zebrad/Cargo.toml b/zebrad/Cargo.toml
index 78f63c177..908a4583a 100644
--- a/zebrad/Cargo.toml
+++ b/zebrad/Cargo.toml
@@ -159,7 +159,7 @@ humantime-serde = "1.1.1"
 indexmap = "2.0.0"
 lazy_static = "1.4.0"
 semver = "1.0.17"
-serde = { version = "1.0.166", features = ["serde_derive"] }
+serde = { version = "1.0.168", features = ["serde_derive"] }
 toml = "0.7.6"
 
 futures = "0.3.28"