diff --git a/.github/workflows/bindgen.yml b/.github/workflows/bindgen.yml
index 9ee3ce642d..8faa4988ec 100644
--- a/.github/workflows/bindgen.yml
+++ b/.github/workflows/bindgen.yml
@@ -3,10 +3,10 @@ name: bindgen
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   rustfmt-clippy:
diff --git a/.github/workflows/deploy-book.yml b/.github/workflows/deploy-book.yml
index ce7083c8c8..a0d87a2094 100644
--- a/.github/workflows/deploy-book.yml
+++ b/.github/workflows/deploy-book.yml
@@ -3,7 +3,7 @@ name: Deploy book
 on:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   deploy-book:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 740a4cb182..bfc611cdc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1302,7 +1302,7 @@ Released 2017/10/27
   have. [#1094][]
 
 [faq]: https://rust-lang.github.io/rust-bindgen/faq.html
-[fuzzing]: https://github.com/rust-lang/rust-bindgen/blob/master/csmith-fuzzing/README.md
+[fuzzing]: https://github.com/rust-lang/rust-bindgen/blob/main/csmith-fuzzing/README.md
 
 [#938]: https://github.com/rust-lang/rust-bindgen/issues/938
 [#888]: https://github.com/rust-lang/rust-bindgen/issues/888
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ea0fcd9725..af7a62321a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -336,7 +336,7 @@ the `codegen::postprocessing` module by following these steps:
 
 Ensure that each commit stands alone, and passes tests. This enables better `git
 bisect`ing when needed. If your commits do not stand on their own, then rebase
-them on top of the latest master and squash them into a single commit.
+them on top of the latest main and squash them into a single commit.
 
 All pull requests undergo code review before merging. To request review, comment
 `r? @github_username_of_reviewer`. They we will respond with `r+` to approve the
@@ -419,7 +419,7 @@ $ brew install creduce
 $ # Etc...
 ```
 
-Otherwise, follow [these instructions](https://github.com/csmith-project/creduce/blob/master/INSTALL.md) for building and/or installing `creduce`.
+Otherwise, follow [these instructions](https://github.com/csmith-project/creduce/blob/main/INSTALL.md) for building and/or installing `creduce`.
 
 Running `creduce` requires two things:
 
@@ -548,9 +548,9 @@ $ ./node_modules/doctoc/doctoc.js CHANGELOG.md
 Bump version numbers as needed. Run tests just to ensure everything is working
 as expected.
 
-### Merge to `master`
+### Merge to `main`
 
-For regular releases, the changes above should end up in `master` before
+For regular releases, the changes above should end up in `main` before
 publishing. For dot-releases of an old version (e.g., cherry-picking an
 important fix) you can skip this.
 
diff --git a/appveyor.yml b/appveyor.yml
index 62efeea2c4..741c59fda4 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -25,7 +25,7 @@ platform:
 
 branches:
   only:
-    - master
+    - main
 
 install:
   - if %PLATFORM% == x86 (set RUST_PLATFORM=i686&set MINGW_BITS=32) else (set RUST_PLATFORM=x86_64&set MINGW_BITS=64)
diff --git a/releases/release-announcement-template.md b/releases/release-announcement-template.md
index 9f4e87cc4b..c33ef85f4c 100644
--- a/releases/release-announcement-template.md
+++ b/releases/release-announcement-template.md
@@ -41,7 +41,7 @@ Found a bug with `bindgen`? [File an issue here.][file-issue]
 [crates.io]: https://crates.io/crates/bindgen
 [guide]: https://rust-lang.github.io/rust-bindgen
 [docs]: https://docs.rs/bindgen
-[contributing]: https://github.com/rust-lang/rust-bindgen/blob/master/CONTRIBUTING.md
+[contributing]: https://github.com/rust-lang/rust-bindgen/blob/main/CONTRIBUTING.md
 [easy]: https://github.com/rust-lang/rust-bindgen/issues?q=is%3Aopen+is%3Aissue+label%3AE-easy
 [less-easy]: https://github.com/rust-lang/rust-bindgen/issues?q=is%3Aopen+is%3Aissue+label%3AE-less-easy
 [looking]: https://github.com/rust-lang/rust-bindgen/issues/747