diff --git a/Cargo.lock b/Cargo.lock
index c11c2c22..41fd3408 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -856,9 +856,9 @@ dependencies = [
 
 [[package]]
 name = "nix"
-version = "0.30.1"
+version = "0.31.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74523f3a35e05aba87a1d978330aef40f67b0304ac79c1c00b294c9830543db6"
+checksum = "cf20d2fde8ff38632c426f1165ed7436270b44f199fc55284c38276f9db47c3d"
 dependencies = [
  "bitflags 2.13.1",
  "cfg-if",
@@ -1362,7 +1362,7 @@ dependencies = [
  "async-trait",
  "cap-std",
  "command-group",
- "nix 0.30.1",
+ "nix 0.31.3",
  "tempfile",
  "tinybox-bus",
  "tinybox-core",
@@ -1414,7 +1414,7 @@ version = "0.1.36"
 dependencies = [
  "async-trait",
  "log",
- "nix 0.30.1",
+ "nix 0.31.3",
  "serde_json",
  "tempfile",
  "tinybox-bus",
diff --git a/crates/tinybox-host/Cargo.toml b/crates/tinybox-host/Cargo.toml
index 9c022f2a..1ae7e90d 100644
--- a/crates/tinybox-host/Cargo.toml
+++ b/crates/tinybox-host/Cargo.toml
@@ -28,7 +28,7 @@ tokio = { workspace = true, features = ["process", "io-util", "sync"] }
 
 [target.'cfg(unix)'.dependencies]
 # Safe process-group signalling supervises descendants; access checks select executable shells.
-nix = { version = "0.30", default-features = false, features = ["signal", "process", "fs"] }
+nix = { version = "0.31", default-features = false, features = ["signal", "process", "fs"] }
 
 [target.'cfg(windows)'.dependencies]
 # Job Objects keep supervised Windows descendants inside one killable process tree.
diff --git a/crates/tinybox-module/Cargo.toml b/crates/tinybox-module/Cargo.toml
index db292550..5b943222 100644
--- a/crates/tinybox-module/Cargo.toml
+++ b/crates/tinybox-module/Cargo.toml
@@ -52,7 +52,7 @@ tempfile = "3"
 
 [target.'cfg(unix)'.dependencies]
 # Stdio children own a process group that is killed as a unit.
-nix = { version = "0.30", default-features = false, features = ["signal", "process"] }
+nix = { version = "0.31", default-features = false, features = ["signal", "process"] }
 
 [dev-dependencies]
 # Tests serve the storage objects on the in-memory broker the module connects to.