diff --git a/Cargo.lock b/Cargo.lock
index b002622b5..9cd620c02 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1712,18 +1712,18 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.138"
+version = "1.0.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1578c6245786b9d168c5447eeacfb96856573ca56c9d68fdcf394be134882a47"
+checksum = "0171ebb889e45aa68b44aee0859b3eede84c6f5f5c228e6f140c0b2a0a46cad6"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.138"
+version = "1.0.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "023e9b1467aef8a10fb88f25611870ada9800ef7e22afce356bb0d2387b6f27c"
+checksum = "dc1d3230c1de7932af58ad8ffbe1d784bd55efd5a9d84ac24f69c72d83543dfb"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/rust/sync-server/Cargo.toml b/rust/sync-server/Cargo.toml
index b513ce95e..456fe396a 100644
--- a/rust/sync-server/Cargo.toml
+++ b/rust/sync-server/Cargo.toml
@@ -13,7 +13,7 @@ actix-web = "^3.3.2"
 anyhow = "1.0"
 thiserror = "1.0"
 futures = "^0.3.8"
-serde = "^1.0.138"
+serde = "^1.0.139"
 serde_json = "^1.0"
 clap = "^3.2.8"
 log = "^0.4.17"
diff --git a/rust/taskchampion/Cargo.toml b/rust/taskchampion/Cargo.toml
index cb57e6a5b..1f3fbf160 100644
--- a/rust/taskchampion/Cargo.toml
+++ b/rust/taskchampion/Cargo.toml
@@ -12,7 +12,7 @@ edition = "2018"
 
 [dependencies]
 uuid = { version = "^1.1.2", features = ["serde", "v4"] }
-serde = { version = "^1.0.138", features = ["derive"] }
+serde = { version = "^1.0.139", features = ["derive"] }
 serde_json = "^1.0"
 chrono = { version = "^0.4.10", features = ["serde"] }
 anyhow = "1.0"