diff --git a/Cargo.lock b/Cargo.lock
index 931653c0..c98323c7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -307,9 +307,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.155"
+version = "0.2.169"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
+checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
 
 [[package]]
 name = "libloading"
@@ -648,7 +648,7 @@ dependencies = [
 
 [[package]]
 name = "tskit"
-version = "0.15.0-alpha.1"
+version = "0.15.0-alpha.2"
 dependencies = [
  "anyhow",
  "bincode",
diff --git a/Cargo.toml b/Cargo.toml
index 297afd9b..f2781bc0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ codegen-units=1
 
 [dependencies]
 thiserror = "1.0"
-libc = "0.2.155"
+libc = "0.2.169"
 streaming-iterator = "0.1.5"
 bitflags = "2.6.0"
 humantime = {version = "2.1.0", optional = true}