diff --git a/mmtk/Cargo.lock b/mmtk/Cargo.lock
index e09ca69..b5aec5b 100644
--- a/mmtk/Cargo.lock
+++ b/mmtk/Cargo.lock
@@ -129,9 +129,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.2.47"
+version = "1.2.49"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd405d82c84ff7f35739f175f67d8b9fb7687a0e84ccdc78bd3568839827cf07"
+checksum = "90583009037521a116abf44494efecd645ba48b6622457080f080b85544e2215"
 dependencies = [
  "find-msvc-tools",
  "jobserver",
@@ -308,9 +308,9 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.20.2"
+version = "0.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2deb07a133b1520dc1a5690e9bd08950108873d7ed5de38dcc74d3b5ebffa110"
+checksum = "3e2b37e2f62729cdada11f0e6b3b6fe383c69c29fc619e391223e12856af308c"
 dependencies = [
  "bitflags",
  "libc",
@@ -430,15 +430,15 @@ checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 
 [[package]]
 name = "libc"
-version = "0.2.177"
+version = "0.2.178"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2874a2af47a2325c2001a6e6fad9b16a53b802102b528163885171cf92b15976"
+checksum = "37c93d8daa9d8a012fd8ab92f088405fb202ea0b6ab73ee2482ae66af4f42091"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.18.2+1.9.1"
+version = "0.18.3+1.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c42fe03df2bd3c53a3a9c7317ad91d80c81cd1fb0caec8d7cc4cd2bfa10c222"
+checksum = "c9b3acc4b91781bb0b3386669d325163746af5f6e4f73e6d2d630e09a35f3487"
 dependencies = [
  "cc",
  "libc",
@@ -469,9 +469,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.28"
+version = "0.4.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
+checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
 
 [[package]]
 name = "memchr"
@@ -491,7 +491,7 @@ dependencies = [
 [[package]]
 name = "mmtk"
 version = "0.31.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=94b75bfbe144288d9a9bbf578473be7da4952d3d#94b75bfbe144288d9a9bbf578473be7da4952d3d"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=2ad6d36ab3d82be46135a7d76d4fe59cc84620ed#2ad6d36ab3d82be46135a7d76d4fe59cc84620ed"
 dependencies = [
  "atomic",
  "atomic-traits",
@@ -530,7 +530,7 @@ dependencies = [
 [[package]]
 name = "mmtk-macros"
 version = "0.31.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=94b75bfbe144288d9a9bbf578473be7da4952d3d#94b75bfbe144288d9a9bbf578473be7da4952d3d"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=2ad6d36ab3d82be46135a7d76d4fe59cc84620ed#2ad6d36ab3d82be46135a7d76d4fe59cc84620ed"
 dependencies = [
  "proc-macro-error",
  "proc-macro2",
diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
index cede083..abd8162 100644
--- a/mmtk/Cargo.toml
+++ b/mmtk/Cargo.toml
@@ -12,7 +12,7 @@ edition = "2021"
 # Metadata for the Ruby repository
 [package.metadata.ci-repos.ruby]
 repo = "mmtk/ruby" # This is used by actions/checkout, so the format is "owner/repo", not URL.
-rev = "febebee7431b1e2810e00419350b38115d4a6051"
+rev = "42eae121557de55e5ef6af3525c9253da7298fca"
 
 [lib]
 name = "mmtk_ruby"
@@ -37,7 +37,7 @@ features = ["is_mmtk_object", "object_pinning", "sticky_immix_non_moving_nursery
 
 # Uncomment the following lines to use mmtk-core from the official repository.
 git = "https://github.com/mmtk/mmtk-core.git"
-rev = "94b75bfbe144288d9a9bbf578473be7da4952d3d"
+rev = "2ad6d36ab3d82be46135a7d76d4fe59cc84620ed"
 
 # Uncomment the following line to use mmtk-core from a local repository.
 #path = "../../mmtk-core"