diff --git a/mmtk/Cargo.lock b/mmtk/Cargo.lock
index 421e5c0..1c42420 100644
--- a/mmtk/Cargo.lock
+++ b/mmtk/Cargo.lock
@@ -574,7 +574,7 @@ dependencies = [
 [[package]]
 name = "mmtk"
 version = "0.32.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=37d81218028d788f7a24158aac0588c3f6925d08#37d81218028d788f7a24158aac0588c3f6925d08"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=cafcece9f3753c4ad3c13077c2eb12b7493d470b#cafcece9f3753c4ad3c13077c2eb12b7493d470b"
 dependencies = [
  "atomic",
  "atomic-traits",
@@ -610,7 +610,7 @@ dependencies = [
 [[package]]
 name = "mmtk-macros"
 version = "0.32.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=37d81218028d788f7a24158aac0588c3f6925d08#37d81218028d788f7a24158aac0588c3f6925d08"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=cafcece9f3753c4ad3c13077c2eb12b7493d470b#cafcece9f3753c4ad3c13077c2eb12b7493d470b"
 dependencies = [
  "proc-macro-error",
  "proc-macro2",
diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
index a1e14fa..16bdac7 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 = "6a6958366068a4cd61a579246c35641c0567c3b2"
+rev = "ed1585b9cbc66b57ec14a5e5e8f5a0fc191400d4"
 
 [lib]
 name = "mmtk_ruby"
@@ -37,7 +37,7 @@ features = ["vo_bit", "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 = "37d81218028d788f7a24158aac0588c3f6925d08"
+rev = "cafcece9f3753c4ad3c13077c2eb12b7493d470b"
 
 # Uncomment the following line to use mmtk-core from a local repository.
 #path = "../../mmtk-core"