diff --git a/tools/checksum_updater/Cargo.lock b/tools/checksum_updater/Cargo.lock
index 3438c2d3..d8e7826f 100644
--- a/tools/checksum_updater/Cargo.lock
+++ b/tools/checksum_updater/Cargo.lock
@@ -2025,9 +2025,9 @@ checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
 [[package]]
 name = "uuid"
-version = "1.20.0"
+version = "1.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee48d38b119b0cd71fe4141b30f5ba9c7c5d9f4e7a3a8b4a674e4b6ef789976f"
+checksum = "b672338555252d43fd2240c714dc444b8c6fb0a5c5335e65a07bba7742735ddb"
 
 [[package]]
 name = "valuable"
diff --git a/tools/checksum_updater/Cargo.toml b/tools/checksum_updater/Cargo.toml
index 9026a3b8..9dabaf10 100644
--- a/tools/checksum_updater/Cargo.toml
+++ b/tools/checksum_updater/Cargo.toml
@@ -32,7 +32,7 @@ tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 tempfile = "3.24"
 async-trait = "0.1"
 wit-bindgen = "0.52.0"  # WIT binding generation for macro usage (MUST match CLI version in wasm_toolchain.bzl)
-uuid = { version = "1.20", default-features = false }  # UUID generation for user service (deterministic, no getrandom dependency)
+uuid = { version = "1.21", default-features = false }  # UUID generation for user service (deterministic, no getrandom dependency)
 bitflags = "2.6"  # Bitflags for WASI filesystem interfaces in generated bindings
 
 [dev-dependencies]