diff --git a/Cargo.lock b/Cargo.lock
index 931653c0..6d7c6b95 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -443,9 +443,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.79"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
+checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
 dependencies = [
  "unicode-ident",
 ]
@@ -555,9 +555,9 @@ checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
 [[package]]
 name = "serde"
-version = "1.0.203"
+version = "1.0.214"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
+checksum = "f55c3193aca71c12ad7890f1785d2b73e1b9f63a0bbc353c08ef26fe03fc56b5"
 dependencies = [
  "serde_derive",
 ]
@@ -577,9 +577,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.203"
+version = "1.0.214"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
+checksum = "de523f781f095e28fa605cdce0f8307e451cc0fd14e2eb4cd2e98a355b147766"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -617,9 +617,9 @@ checksum = "5ee073c9e4cd00e28217186dbe12796d692868f432bf2e97ee73bed0c56dfa01"
 
 [[package]]
 name = "syn"
-version = "2.0.57"
+version = "2.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11a6ae1e52eb25aab8f3fb9fca13be982a373b8f1157ca14b897a825ba4a2d35"
+checksum = "e89275301d38033efb81a6e60e3497e734dfcc62571f2854bf4b16690398824c"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index d919f0c9..73ae609e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ libc = "0.2.155"
 streaming-iterator = "0.1.5"
 bitflags = "2.6.0"
 humantime = {version = "2.1.0", optional = true}
-serde = {version = "1.0.203", features = ["derive"], optional = true}
+serde = {version = "1.0.214", features = ["derive"], optional = true}
 serde_json = {version = "1.0.120", optional = true}
 bincode = {version = "1.3.1", optional = true}
 tskit-derive = {version = "0.2.0", path = "tskit-derive", optional = true}
@@ -34,7 +34,7 @@ delegate = "0.12.0"
 [dev-dependencies]
 anyhow = {version = "1.0.86"}
 clap = {version = "4.4.6", features = ["derive"]}
-serde = {version = "1.0.203", features = ["derive"]}
+serde = {version = "1.0.214", features = ["derive"]}
 serde-pickle = "1.1.0"
 serde_json = {version = "1.0.120"}
 bincode = "1.3.1"