diff --git a/Cargo.lock b/Cargo.lock
index df478bc5..d2b17ef6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -26,7 +26,7 @@ checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
 [[package]]
 name = "chacha20"
-version = "0.10.0-rc.12"
+version = "0.10.0"
 dependencies = [
  "cfg-if",
  "cipher",
diff --git a/chacha20/CHANGELOG.md b/chacha20/CHANGELOG.md
index 5e765409..47c055bd 100644
--- a/chacha20/CHANGELOG.md
+++ b/chacha20/CHANGELOG.md
@@ -5,29 +5,41 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## 0.10.0 (UNRELEASED)
+## 0.10.0 (2026-02-07)
 ### Added
-- `rand_core` support ([#333])
-
-### Removed
-- `chacha20_force_neon` cfg attribute ([#361])
-- `std` feature ([#397])
-
-### Fixed
-- `StreamId` endianness ([#389])
-- `StreamId` `From` impl ([#392])
+- `rand_core` v0.10 support ([#333], [#513])
+- 64-bit counter support ([#439])
+- `{get,set}_block_pos` inherent methods ([#516])
+- AVX-512 backend - requires `--cfg chacha20_avx512` to enable ([#477])
 
 ### Changed
-- Bump `cipher` from `0.4` to `0.5` ([#338])
+- Bump `cipher` from `0.4` to `0.5` - replaces `generic-array` with `hybrid-array` ([#338], [#521])
 - Edition changed to 2024 and MSRV bumped to 1.85 ([#397])
 - Relax MSRV policy and allow MSRV bumps in patch releases
+- Bump `cpufeatures` to v0.3 ([#530])
+- `--cfg chacha20_backend="..."` replaces previous `chacha20_force*` ([#520])
+  - `chacha20_force_avx2` => `chacha20_backend="avx2"`
+  - `chacha20_force_avx512` => `chacha20_backend="avx512"`
+  - `chacha20_force_soft` => `chacha20_backend="soft"`
+  - `chacha20_force_sse2` => `chacha20_backend="sse2"`
+
+### Removed
+- `chacha20_force_neon` cfg attribute - now on-by-default for supported targets ([#361])
+- `std` feature ([#397])
+- `Clone` impls ([#462])
 
 [#333]: https://github.com/RustCrypto/stream-ciphers/pull/333
 [#338]: https://github.com/RustCrypto/stream-ciphers/pull/338
 [#361]: https://github.com/RustCrypto/stream-ciphers/pull/361
-[#389]: https://github.com/RustCrypto/stream-ciphers/pull/389
-[#392]: https://github.com/RustCrypto/stream-ciphers/pull/392
 [#397]: https://github.com/RustCrypto/stream-ciphers/pull/397
+[#439]: https://github.com/RustCrypto/stream-ciphers/pull/439
+[#462]: https://github.com/RustCrypto/stream-ciphers/pull/462
+[#477]: https://github.com/RustCrypto/stream-ciphers/pull/477
+[#513]: https://github.com/RustCrypto/stream-ciphers/pull/513
+[#516]: https://github.com/RustCrypto/stream-ciphers/pull/516
+[#520]: https://github.com/RustCrypto/stream-ciphers/pull/520
+[#521]: https://github.com/RustCrypto/stream-ciphers/pull/521
+[#530]: https://github.com/RustCrypto/stream-ciphers/pull/530
 
 ## 0.9.1 (2023-04-01)
 ### Added
diff --git a/chacha20/Cargo.toml b/chacha20/Cargo.toml
index a0c8f8e5..d4650dec 100644
--- a/chacha20/Cargo.toml
+++ b/chacha20/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "chacha20"
-version = "0.10.0-rc.12"
+version = "0.10.0"
 authors = ["RustCrypto Developers"]
 edition = "2024"
 rust-version = "1.85"
diff --git a/chacha20/README.md b/chacha20/README.md
index d96de51f..78a479aa 100644
--- a/chacha20/README.md
+++ b/chacha20/README.md
@@ -34,7 +34,7 @@ work on stable Rust with the following `RUSTFLAGS`:
   - `sse2`: (~1.6cpb) `-Ctarget-feature=+sse2` (on by default on x86 CPUs)
   - `avx512`: `-Ctarget-feature=+avx512f,+avx512vl --cfg chacha20_avx512` requires Rust 1.89+
 - `aarch64`
-  - `neon` (~2-3x faster than `soft`) requires Rust 1.61+ and the `neon` feature enabled
+  - `neon` (~2-3x faster than `soft`) requires the `neon` feature enabled
 - Portable
   - `soft`: (~5 cpb on x86/x86_64)