diff --git a/build_system/tests.rs b/build_system/tests.rs
index 31d1de600d1..1c3e615c7ab 100644
--- a/build_system/tests.rs
+++ b/build_system/tests.rs
@@ -133,8 +133,8 @@ pub(crate) static REGEX: CargoProject = CargoProject::new(&REGEX_REPO.source_dir
 pub(crate) static PORTABLE_SIMD_REPO: GitRepo = GitRepo::github(
     "rust-lang",
     "portable-simd",
-    "f505736e45e256efcb36bf85b7f920ccef320435",
-    "b012e6b58fa0f78d",
+    "5794c837bc605c4cd9dbb884285976dfdb293cce",
+    "a64d8fdd0ed0d9c4",
     "portable-simd",
 );
 
diff --git a/patches/stdlib-lock.toml b/patches/stdlib-lock.toml
index 86f95fba96b..369f9c88be1 100644
--- a/patches/stdlib-lock.toml
+++ b/patches/stdlib-lock.toml
@@ -150,9 +150,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.3.3"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d77f7ec81a6d05a3abb01ab6eb7590f6083d08449fe5a1c8b1e620283546ccb7"
+checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 dependencies = [
  "compiler_builtins",
  "rustc-std-workspace-alloc",
diff --git a/rust-toolchain b/rust-toolchain
index 0982bd88cc8..e9f225b4e9e 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2024-02-20"
+channel = "nightly-2024-03-08"
 components = ["rust-src", "rustc-dev", "llvm-tools"]