diff --git a/CHANGELOG.md b/CHANGELOG.md
index 38628d7..319f4c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 No unreleased changes yet
 
+## [v1.2.0] - 2024-10-16
+
+- Soundness fix: ensure the `CriticalSection` token is not `Send` or `Sync`, so that it can only be used in the thread that acquired it. [#55](https://github.com/rust-embedded/critical-section/issues/55)
+- Soundness fix: Fix aliasing `&mut` in the `std` implementation. [#46](https://github.com/rust-embedded/critical-section/pull/46)
+- Fix build with `restore-state-usize`. [#50](https://github.com/rust-embedded/critical-section/pull/50)
+
 ## [v1.1.3] - 2024-08-22
 
 - Added option to use a `usize` sized restore state
@@ -123,8 +129,9 @@ If you're seeing a linker error like `undefined symbol: _critical_section_1_0_ac
 
 - First release
 
-[Unreleased]: https://github.com/rust-embedded/critical-section/compare/v1.1.3...HEAD
-[v1.1.2]: https://github.com/rust-embedded/critical-section/compare/v1.1.2...v1.1.3
+[Unreleased]: https://github.com/rust-embedded/critical-section/compare/v1.2.0...HEAD
+[v1.2.0]: https://github.com/rust-embedded/critical-section/compare/v1.1.3...v1.2.0
+[v1.1.3]: https://github.com/rust-embedded/critical-section/compare/v1.1.2...v1.1.3
 [v1.1.2]: https://github.com/rust-embedded/critical-section/compare/v1.1.1...v1.1.2
 [v1.1.1]: https://github.com/rust-embedded/critical-section/compare/v1.1.0...v1.1.1
 [v1.1.0]: https://github.com/rust-embedded/critical-section/compare/v1.0.0...v1.1.0
diff --git a/Cargo.toml b/Cargo.toml
index 387d2a2..ce12955 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "critical-section"
-version = "1.1.3"
+version = "1.2.0"
 edition = "2018"
 description = "Cross-platform critical section"
 repository = "https://github.com/rust-embedded/critical-section"
diff --git a/src/lib.rs b/src/lib.rs
index 215c066..3c05de8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -16,6 +16,10 @@ pub use self::mutex::Mutex;
 #[derive(Clone, Copy, Debug)]
 pub struct CriticalSection<'cs> {
     _private: PhantomData<&'cs ()>,
+
+    // Prevent CriticalSection from being Send or Sync
+    // https://github.com/rust-embedded/critical-section/issues/55
+    _not_send_sync: PhantomData<*mut ()>,
 }
 
 impl<'cs> CriticalSection<'cs> {
@@ -40,6 +44,7 @@ impl<'cs> CriticalSection<'cs> {
     pub unsafe fn new() -> Self {
         CriticalSection {
             _private: PhantomData,
+            _not_send_sync: PhantomData,
         }
     }
 }