diff --git a/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.lock b/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.lock
index d0e9889..af71a73 100644
--- a/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.lock
+++ b/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.lock
@@ -427,18 +427,18 @@ checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
 [[package]]
 name = "serde"
-version = "1.0.207"
+version = "1.0.209"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5665e14a49a4ea1b91029ba7d3bca9f299e1f7cfa194388ccc20f14743e784f2"
+checksum = "99fce0ffe7310761ca6bf9faf5115afbc19688edd00171d81b1bb1b116c63e09"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.207"
+version = "1.0.209"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6aea2634c86b0e8ef2cfdc0c340baede54ec27b1e46febd7f80dffb2aa44a00e"
+checksum = "a5831b979fd7b5439637af1752d535ff49f4860c0f341d1baeb6faf0f4242170"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.toml b/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.toml
index 1a64d2c..ac35fd0 100644
--- a/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.toml
+++ b/exercises/4-multitasking/3-asynchronous-multitasking/3-measurement-data-sink/node-simulator/Cargo.toml
@@ -10,7 +10,7 @@ anyhow = "1.0.82"
 clap = { version = "4.5.4", features = ["derive"] }
 humantime = "2.1.0"
 rand = "0.8.5"
-serde = { version = "1.0.207", features = ["derive"] }
+serde = { version = "1.0.209", features = ["derive"] }
 serde_json = "1.0.125"
 tokio = { version = "1.37.0", features = ["net", "io-util", "macros", "rt-multi-thread", "time", "signal"] }
 tracing = "0.1.40"