diff --git a/Cargo.lock b/Cargo.lock
index 843d4ff..8c9c9a5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -219,9 +219,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
-version = "0.4.34"
+version = "0.4.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bc015644b92d5890fab7489e49d21f879d5c990186827d42ec511919404f38b"
+checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
 dependencies = [
  "android-tzdata",
  "iana-time-zone",
diff --git a/crates/lox-distributor/Cargo.toml b/crates/lox-distributor/Cargo.toml
index f6b9b50..dca389a 100644
--- a/crates/lox-distributor/Cargo.toml
+++ b/crates/lox-distributor/Cargo.toml
@@ -38,5 +38,5 @@ prometheus-client = "0.22.2"
 thiserror = "1"
 
 [dependencies.chrono]
-version = "0.4.34"
+version = "0.4.38"
 features = ["serde"]
diff --git a/crates/lox-utils/Cargo.toml b/crates/lox-utils/Cargo.toml
index 2879664..5fa4755 100644
--- a/crates/lox-utils/Cargo.toml
+++ b/crates/lox-utils/Cargo.toml
@@ -12,7 +12,7 @@ categories = ["rust-patterns"]
 repository = "https://gitlab.torproject.org/tpo/anti-censorship/lox.git/"
 
 [dependencies]
-chrono = { version = "0.4.34", features = ["serde", "clock"] }
+chrono = { version = "0.4.38", features = ["serde", "clock"] }
 lox-library = {path = "../lox-library", version = "0.1.0"}
 serde = "1"
 serde_json = "1.0.113"
diff --git a/crates/lox-wasm/Cargo.toml b/crates/lox-wasm/Cargo.toml
index ace07c9..4de6c71 100644
--- a/crates/lox-wasm/Cargo.toml
+++ b/crates/lox-wasm/Cargo.toml
@@ -30,5 +30,5 @@ rand = { version = "0.7", features = ["wasm-bindgen"] }
 lox-zkp = { git = "https://gitlab.torproject.org/onyinyang/lox-zkp",  version = "0.8.0" }
 
 [dependencies.chrono]
-version = "0.4.34"
+version = "0.4.38"
 features = ["serde", "wasmbind"]
diff --git a/crates/rdsys-backend-api/Cargo.toml b/crates/rdsys-backend-api/Cargo.toml
index a249ffc..0556013 100644
--- a/crates/rdsys-backend-api/Cargo.toml
+++ b/crates/rdsys-backend-api/Cargo.toml
@@ -25,4 +25,4 @@ reqwest = { version = "0.11", features = ["json", "stream"]}
 tokio-stream = "0.1.15"
 futures = "0.3.30"
 tokio-util = "0.7.10"
-chrono = { version = "0.4.34", features = ["serde", "clock"] }
+chrono = { version = "0.4.38", features = ["serde", "clock"] }