diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 435fd16..29d0c65 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,10 +2,10 @@ name: Build
 on:
   pull_request:
     branches:
-    - master
+    - main
   push:
     branches:
-    - master
+    - main
 jobs:
   build:
     name: Build
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 6598e3e..d1ad113 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1 +1 @@
-Please see the [WHATWG Contributor Guidelines](https://github.com/whatwg/meta/blob/master/CONTRIBUTING.md).
+Please see the [WHATWG Contributor Guidelines](https://github.com/whatwg/meta/blob/main/CONTRIBUTING.md).
diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
index f563387..cf29d04 100644
--- a/PULL_REQUEST_TEMPLATE.md
+++ b/PULL_REQUEST_TEMPLATE.md
@@ -7,7 +7,7 @@ Thank you for contributing to the XMLHttpRequest Standard! Please describe the c
    * …
 - [ ] [Tests](https://github.com/web-platform-tests/wpt) are written and can be reviewed and commented upon at:
    * …
-- [ ] [Implementation bugs](https://github.com/whatwg/meta/blob/master/MAINTAINERS.md#handling-pull-requests) are filed:
+- [ ] [Implementation bugs](https://github.com/whatwg/meta/blob/main/MAINTAINERS.md#handling-pull-requests) are filed:
    * Chrome: …
    * Firefox: …
    * Safari: …
diff --git a/README.md b/README.md
index 1162c95..85befbd 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ started, leave a comment on the issue or ask around [on IRC](https://whatwg.org/
 ## Pull requests
 
 In short, change `xhr.bs` and submit your patch, with a
-[good commit message](https://github.com/whatwg/meta/blob/master/COMMITTING.md). Consider
+[good commit message](https://github.com/whatwg/meta/blob/main/COMMITTING.md). Consider
 reading through the [WHATWG FAQ](https://whatwg.org/faq) if you are new here.
 
 Please add your name to the Acknowledgments section in your first pull request, even for trivial
@@ -26,12 +26,12 @@ fixes. The names are sorted lexicographically.
 
 For quick local iteration, run `make`. To verify your changes locally, run `make deploy`. See more
 in the
-[WHATWG Contributor Guidelines](https://github.com/whatwg/meta/blob/master/CONTRIBUTING.md#building).
+[WHATWG Contributor Guidelines](https://github.com/whatwg/meta/blob/main/CONTRIBUTING.md#building).
 
 ## Merge policy
 
 If you can commit to this repository, see the
-[WHATWG Maintainer Guidelines](https://github.com/whatwg/meta/blob/master/MAINTAINERS.md).
+[WHATWG Maintainer Guidelines](https://github.com/whatwg/meta/blob/main/MAINTAINERS.md).
 
 ## Tests