diff --git a/mmtk/Cargo.lock b/mmtk/Cargo.lock
index e538a49..a7c99b6 100644
--- a/mmtk/Cargo.lock
+++ b/mmtk/Cargo.lock
@@ -99,18 +99,18 @@ checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
 [[package]]
 name = "built"
-version = "0.7.4"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "236e6289eda5a812bc6b53c3b024039382a2895fbbeef2d748b2931546d392c4"
+checksum = "c360505aed52b7ec96a3636c3f039d99103c37d1d9b4f7a8c743d3ea9ffcd03b"
 dependencies = [
  "git2",
 ]
 
 [[package]]
 name = "bytemuck"
-version = "1.18.0"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94bbb0ad554ad961ddc5da507a12a29b14e4ae5bda06b19f575a3e6079d2e2ae"
+checksum = "8334215b81e418a0a7bdb8ef0849474f40bb10c8b71f1c4ed315cff49f32494d"
 dependencies = [
  "bytemuck_derive",
 ]
@@ -123,14 +123,14 @@ checksum = "bcfcc3cd946cb52f0bbfdbbcfa2f4e24f75ebb6c0e1002f7c25904fada18b9ec"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.82",
 ]
 
 [[package]]
 name = "cc"
-version = "1.1.30"
+version = "1.1.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b16803a61b81d9eabb7eae2588776c4c1e584b738ede45fdbb4c972cec1e9945"
+checksum = "c2e7962b54006dcfcc61cb72735f4d89bb97061dd6a7ed882ec6b8ee53714c6f"
 dependencies = [
  "jobserver",
  "libc",
@@ -219,7 +219,7 @@ checksum = "4e018fccbeeb50ff26562ece792ed06659b9c2dae79ece77c4456bb10d9bf79b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.82",
 ]
 
 [[package]]
@@ -251,7 +251,7 @@ checksum = "f282cfdfe92516eb26c2af8589c274c7c17681f5ecc03c18255fe741c6aa64eb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.82",
 ]
 
 [[package]]
@@ -376,9 +376,9 @@ checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 
 [[package]]
 name = "libc"
-version = "0.2.159"
+version = "0.2.161"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "561d97a539a36e26a9a5fad1ea11a3039a67714694aaa379433e580854bc3dc5"
+checksum = "8e9489c2807c139ffd9c1794f4af0ebe86a828db53ecdc7fea2111d0fed085d1"
 
 [[package]]
 name = "libgit2-sys"
@@ -438,7 +438,7 @@ dependencies = [
 [[package]]
 name = "mmtk"
 version = "0.28.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=328deb6bfb920e895594f374e83daad57b639a7f#328deb6bfb920e895594f374e83daad57b639a7f"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=618fde4d1751269c1047f60336fe4800b1d8f48c#618fde4d1751269c1047f60336fe4800b1d8f48c"
 dependencies = [
  "atomic",
  "atomic-traits",
@@ -474,12 +474,12 @@ dependencies = [
 [[package]]
 name = "mmtk-macros"
 version = "0.28.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=328deb6bfb920e895594f374e83daad57b639a7f#328deb6bfb920e895594f374e83daad57b639a7f"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=618fde4d1751269c1047f60336fe4800b1d8f48c#618fde4d1751269c1047f60336fe4800b1d8f48c"
 dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 2.0.82",
 ]
 
 [[package]]
@@ -580,9 +580,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.87"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3e4daa0dcf6feba26f985457cdf104d4b4256fc5a09547140f3631bb076b19a"
+checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
 dependencies = [
  "unicode-ident",
 ]
@@ -656,9 +656,9 @@ dependencies = [
 
 [[package]]
 name = "rustversion"
-version = "1.0.17"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
+checksum = "0e819f2bc632f285be6d7cd36e25940d45b2391dd6d9b939e79de557f7014248"
 
 [[package]]
 name = "scopeguard"
@@ -709,7 +709,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.79",
+ "syn 2.0.82",
 ]
 
 [[package]]
@@ -724,9 +724,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.79"
+version = "2.0.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89132cd0bf050864e1d38dc3bbc07a0eb8e7530af26344d3d2bbbef83499f590"
+checksum = "83540f837a8afc019423a8edb95b52a8effe46957ee402287f4292fae35be021"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
index 574deeb..b826f48 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 = "9036b4e1a403fdcb8e6f171ee3376d7879351e80"
+rev = "d6d62553dea7ff9dd1f8b41a3227e6293c8ce1a4"
 
 [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 = "328deb6bfb920e895594f374e83daad57b639a7f"
+rev = "618fde4d1751269c1047f60336fe4800b1d8f48c"
 
 # Uncomment the following line to use mmtk-core from a local repository.
 #path = "../../mmtk-core"