diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5922110..029124ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+0.6.0 (2021-08-10)
+===
+
+* Supports the `Immix` plan.
+* Uses side mark bit by default. Adds a feature 'mark_bit_in_header' to switch to in-header mark bit.
+* Adds a size check for allocation so over-sized objects will be allocated to large object space.
+* Updates to mmtk-core 0.6.0.
+
 0.5.0 (2021-06-28)
 ===
 
diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
index 3fd768bd..7a24b502 100644
--- a/mmtk/Cargo.toml
+++ b/mmtk/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mmtk_openjdk"
-version = "0.5.0"
+version = "0.6.0"
 authors = [" <>"]
 
 [lib]
@@ -20,7 +20,7 @@ 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 = "093da769a71067dcd4f37db6f453213e7dace660" }
+mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "8465b166cecfffed5615753c46bc8e9d032a5b82" }
 # Uncomment the following to build locally
 # mmtk = { path = "../repos/mmtk-core" }