diff --git a/Cargo.lock b/Cargo.lock
index 29c9b29d6bb..6bcd89b38ab 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2321,9 +2321,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.126"
+version = "0.2.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+checksum = "505e71a4706fa491e9b1b55f51b95d4037d0821ee40131190475f692b35b009b"
 
 [[package]]
 name = "libloading"
diff --git a/nexus/Cargo.toml b/nexus/Cargo.toml
index f1e9c0ce280..b8b30c8278a 100644
--- a/nexus/Cargo.toml
+++ b/nexus/Cargo.toml
@@ -27,7 +27,7 @@ hyper = "0.14"
 internal-dns-client = { path = "../internal-dns-client" }
 ipnetwork = "0.20"
 lazy_static = "1.4.0"
-libc = "0.2.126"
+libc = "0.2.127"
 macaddr = { version = "1.0.1", features = [ "serde_std" ]}
 mime_guess = "2.0.4"
 newtype_derive = "0.1.6"
diff --git a/sled-agent/Cargo.toml b/sled-agent/Cargo.toml
index 087336698e2..f1643f02402 100644
--- a/sled-agent/Cargo.toml
+++ b/sled-agent/Cargo.toml
@@ -21,7 +21,7 @@ dropshot = { git = "https://github.com/oxidecomputer/dropshot", branch = "main",
 futures = "0.3.21"
 internal-dns-client = { path = "../internal-dns-client" }
 ipnetwork = "0.20"
-libc = "0.2.126"
+libc = "0.2.127"
 macaddr = { version = "1.0.1", features = [ "serde_std" ] }
 nexus-client = { path = "../nexus-client" }
 omicron-common = { path = "../common" }
diff --git a/test-utils/Cargo.toml b/test-utils/Cargo.toml
index 7f10ece1386..75150c2d7b6 100644
--- a/test-utils/Cargo.toml
+++ b/test-utils/Cargo.toml
@@ -8,7 +8,7 @@ license = "MPL-2.0"
 anyhow = "1.0"
 clap = { version = "3.2", features = ["derive"] }
 futures = "0.3.21"
-libc = "0.2.126"
+libc = "0.2.127"
 omicron-common = { path = "../common" }
 postgres-protocol = "0.6.4"
 signal-hook = "0.3"