diff --git a/README.md b/README.md
index fb567dd6a23..6fe5b34ef82 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml:
 
 ```toml
 [dependencies]
-tokio = { version = "1.39.3", features = ["full"] }
+tokio = { version = "1.40.0", features = ["full"] }
 ```
 Then, on your main.rs:
 
diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md
index 4082b1b9392..bddb5c421b6 100644
--- a/tokio/CHANGELOG.md
+++ b/tokio/CHANGELOG.md
@@ -1,3 +1,52 @@
+# 1.40.0 (August 30th, 2024)
+
+### Added
+
+- io: add `util::SimplexStream` ([#6589])
+- process: stabilize `Command::process_group` ([#6731])
+- sync: add `{TrySendError,SendTimeoutError}::into_inner` ([#6755])
+- task: add `JoinSet::join_all` ([#6784])
+
+### Added (unstable)
+
+- runtime: add `Builder::{on_task_spawn, on_task_terminate}` ([#6742])
+
+### Changed
+
+- io: use vectored io for `write_all_buf` when possible ([#6724])
+- runtime: prevent niche-optimization to avoid triggering miri ([#6744])
+- sync: mark mpsc types as `UnwindSafe` ([#6783])
+- sync,time: make `Sleep` and `BatchSemaphore` instrumentation explicit roots ([#6727])
+- task: use `NonZeroU64` for `task::Id` ([#6733])
+- task: include panic message when printing `JoinError` ([#6753])
+- task: add `#[must_use]` to `JoinHandle::abort_handle` ([#6762])
+- time: eliminate timer wheel allocations ([#6779])
+
+### Documented
+
+- docs: clarify that `[build]` section doesn't go in Cargo.toml ([#6728])
+- io: clarify zero remaining capacity case ([#6790])
+- macros: improve documentation for `select!` ([#6774])
+- sync: document mpsc channel allocation behavior ([#6773])
+
+[#6589]: https://github.com/tokio-rs/tokio/pull/6589
+[#6724]: https://github.com/tokio-rs/tokio/pull/6724
+[#6727]: https://github.com/tokio-rs/tokio/pull/6727
+[#6728]: https://github.com/tokio-rs/tokio/pull/6728
+[#6731]: https://github.com/tokio-rs/tokio/pull/6731
+[#6733]: https://github.com/tokio-rs/tokio/pull/6733
+[#6742]: https://github.com/tokio-rs/tokio/pull/6742
+[#6744]: https://github.com/tokio-rs/tokio/pull/6744
+[#6753]: https://github.com/tokio-rs/tokio/pull/6753
+[#6755]: https://github.com/tokio-rs/tokio/pull/6755
+[#6762]: https://github.com/tokio-rs/tokio/pull/6762
+[#6773]: https://github.com/tokio-rs/tokio/pull/6773
+[#6774]: https://github.com/tokio-rs/tokio/pull/6774
+[#6779]: https://github.com/tokio-rs/tokio/pull/6779
+[#6783]: https://github.com/tokio-rs/tokio/pull/6783
+[#6784]: https://github.com/tokio-rs/tokio/pull/6784
+[#6790]: https://github.com/tokio-rs/tokio/pull/6790
+
 # 1.39.3 (August 17th, 2024)
 
 This release fixes a regression where the unix socket api stopped accepting
diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml
index 37dd5e7b7b8..4c5f7d46acb 100644
--- a/tokio/Cargo.toml
+++ b/tokio/Cargo.toml
@@ -6,7 +6,7 @@ name = "tokio"
 #   - README.md
 # - Update CHANGELOG.md.
 # - Create "v1.x.y" git tag.
-version = "1.39.3"
+version = "1.40.0"
 edition = "2021"
 rust-version = "1.70"
 authors = ["Tokio Contributors <team@tokio.rs>"]
diff --git a/tokio/README.md b/tokio/README.md
index fb567dd6a23..6fe5b34ef82 100644
--- a/tokio/README.md
+++ b/tokio/README.md
@@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml:
 
 ```toml
 [dependencies]
-tokio = { version = "1.39.3", features = ["full"] }
+tokio = { version = "1.40.0", features = ["full"] }
 ```
 Then, on your main.rs: