diff --git a/mmtk/Cargo.lock b/mmtk/Cargo.lock
index 76eea6e1..8f1159c5 100644
--- a/mmtk/Cargo.lock
+++ b/mmtk/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "aho-corasick"
@@ -728,8 +728,8 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
 [[package]]
 name = "mmtk"
-version = "0.29.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=2e548e5912ec195cce8d12811902a8617c4143e2#2e548e5912ec195cce8d12811902a8617c4143e2"
+version = "0.30.0"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=ec745353a8de72b645613e0fef3ab7f5f1ad9bd1#ec745353a8de72b645613e0fef3ab7f5f1ad9bd1"
 dependencies = [
  "atomic 0.6.0",
  "atomic-traits",
@@ -782,8 +782,8 @@ dependencies = [
 
 [[package]]
 name = "mmtk-macros"
-version = "0.29.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=2e548e5912ec195cce8d12811902a8617c4143e2#2e548e5912ec195cce8d12811902a8617c4143e2"
+version = "0.30.0"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=ec745353a8de72b645613e0fef3ab7f5f1ad9bd1#ec745353a8de72b645613e0fef3ab7f5f1ad9bd1"
 dependencies = [
  "proc-macro-error",
  "proc-macro2",
diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
index 17c5cec9..8fba265f 100644
--- a/mmtk/Cargo.toml
+++ b/mmtk/Cargo.toml
@@ -33,7 +33,7 @@ lazy_static = "1.1"
 # - change branch
 # - change repo name
 # But other changes including adding/removing whitespaces in commented lines may break the CI
-mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "2e548e5912ec195cce8d12811902a8617c4143e2" }
+mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "ec745353a8de72b645613e0fef3ab7f5f1ad9bd1" }
 # Uncomment the following to build locally
 # mmtk = { path = "../repos/mmtk-core" }
 log = {version = "0.4", features = ["max_level_trace", "release_max_level_off"] }
diff --git a/mmtk/rust-toolchain b/mmtk/rust-toolchain
index ef8b0923..6b4de0a4 100644
--- a/mmtk/rust-toolchain
+++ b/mmtk/rust-toolchain
@@ -1 +1 @@
-1.77.0
\ No newline at end of file
+1.83.0