diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d4401cab..5a717826 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
       - staging
       - trying
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab063d36..819ca8ba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -419,7 +419,7 @@ assert_eq!(right, [2, 4]);
 
 ## Changed
 
-- Enabled CI on master branch.
+- Enabled CI.
 - `Future::join` and `Future::try_join` can now join futures with different
   output types.
 
diff --git a/README.md b/README.md
index 39876bf7..a6d8276d 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,7 @@ fn main() {
 More examples, including networking and file access, can be found in our
 [`examples`] directory and in our [documentation].
 
-[`examples`]: https://github.com/async-rs/async-std/tree/master/examples
+[`examples`]: https://github.com/async-rs/async-std/tree/HEAD/examples
 [documentation]: https://docs.rs/async-std#examples
 [`task::block_on`]: https://docs.rs/async-std/*/async_std/task/fn.block_on.html
 [`"attributes"` feature]: https://docs.rs/async-std/#features
diff --git a/ci/install-mdbook.sh b/ci/install-mdbook.sh
index 01c87f88..52422b97 100755
--- a/ci/install-mdbook.sh
+++ b/ci/install-mdbook.sh
@@ -1,7 +1,7 @@
 set -euxo pipefail
 
 # Based on the Rust-Embedded WG's book CI
-# https://github.com/rust-embedded/book/blob/master/ci/install.sh
+# https://github.com/rust-embedded/book/blob/HEAD/ci/install.sh
 
 main() {
     # Note - this will only accept releases tagged with v0.3.x
diff --git a/docs/src/tutorial/index.md b/docs/src/tutorial/index.md
index aee0b3f4..076ecf41 100644
--- a/docs/src/tutorial/index.md
+++ b/docs/src/tutorial/index.md
@@ -11,4 +11,4 @@ How will it distribute the messages?
 
 This tutorial explains how to write a chat server in `async-std`.
 
-You can also find the tutorial in [our repository](https://github.com/async-rs/async-std/blob/master/examples/a-chat).
+You can also find the tutorial in [our repository](https://github.com/async-rs/async-std/blob/HEAD/examples/a-chat).
diff --git a/examples/README.md b/examples/README.md
index 903ed2cd..bcaae42c 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -154,18 +154,18 @@ Make requests by running the client example:
 cargo run --example udp-client
 ```
 
-[hello-world]: https://github.com/async-rs/async-std/blob/master/examples/hello-world.rs
-[line-count]: https://github.com/async-rs/async-std/blob/master/examples/line-count.rs
-[list-dir]: https://github.com/async-rs/async-std/blob/master/examples/list-dir.rs
-[logging]: https://github.com/async-rs/async-std/blob/master/examples/logging.rs
-[print-file]: https://github.com/async-rs/async-std/blob/master/examples/print-file.rs
-[socket-timeouts]: https://github.com/async-rs/async-std/blob/master/examples/socket-timeouts.rs
-[stdin-echo]: https://github.com/async-rs/async-std/blob/master/examples/stdin-echo.rs
-[stdin-timeout]: https://github.com/async-rs/async-std/blob/master/examples/stdin-timeout.rs
-[surf-web]: https://github.com/async-rs/async-std/blob/master/examples/surf-web.rs
-[task-local]: https://github.com/async-rs/async-std/blob/master/examples/task-local.rs
-[task-name]: https://github.com/async-rs/async-std/blob/master/examples/task-name.rs
-[tcp-client]: https://github.com/async-rs/async-std/blob/master/examples/tcp-client.rs
-[tcp-echo]: https://github.com/async-rs/async-std/blob/master/examples/tcp-echo.rs
-[udp-client]: https://github.com/async-rs/async-std/blob/master/examples/udp-client.rs
-[udp-echo]: https://github.com/async-rs/async-std/blob/master/examples/udp-echo.rs
+[hello-world]: https://github.com/async-rs/async-std/blob/HEAD/examples/hello-world.rs
+[line-count]: https://github.com/async-rs/async-std/blob/HEAD/examples/line-count.rs
+[list-dir]: https://github.com/async-rs/async-std/blob/HEAD/examples/list-dir.rs
+[logging]: https://github.com/async-rs/async-std/blob/HEAD/examples/logging.rs
+[print-file]: https://github.com/async-rs/async-std/blob/HEAD/examples/print-file.rs
+[socket-timeouts]: https://github.com/async-rs/async-std/blob/HEAD/examples/socket-timeouts.rs
+[stdin-echo]: https://github.com/async-rs/async-std/blob/HEAD/examples/stdin-echo.rs
+[stdin-timeout]: https://github.com/async-rs/async-std/blob/HEAD/examples/stdin-timeout.rs
+[surf-web]: https://github.com/async-rs/async-std/blob/HEAD/examples/surf-web.rs
+[task-local]: https://github.com/async-rs/async-std/blob/HEAD/examples/task-local.rs
+[task-name]: https://github.com/async-rs/async-std/blob/HEAD/examples/task-name.rs
+[tcp-client]: https://github.com/async-rs/async-std/blob/HEAD/examples/tcp-client.rs
+[tcp-echo]: https://github.com/async-rs/async-std/blob/HEAD/examples/tcp-echo.rs
+[udp-client]: https://github.com/async-rs/async-std/blob/HEAD/examples/udp-client.rs
+[udp-echo]: https://github.com/async-rs/async-std/blob/HEAD/examples/udp-echo.rs
diff --git a/src/lib.rs b/src/lib.rs
index 73e72223..86786e81 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -56,7 +56,7 @@
 //! * [The async-std website](https://async.rs/)
 //! * [The async-std book](https://book.async.rs)
 //! * [GitHub repository](https://github.com/async-rs/async-std)
-//! * [List of code examples](https://github.com/async-rs/async-std/tree/master/examples)
+//! * [List of code examples](https://github.com/async-rs/async-std/tree/HEAD/examples)
 //! * [Discord chat](https://discord.gg/JvZeVNe)
 //!
 //! # What is in the `async-std` documentation?