diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 2a30c7e..99344e2 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -11,7 +11,7 @@ Closes #
 
 - [ ] Add or update documentation related to these changes
 
-- [ ] Add entry to the [release notes](https://github.com/ethereum/hexbytes/blob/master/newsfragments/README.md)
+- [ ] Add entry to the [release notes](https://github.com/ethereum/hexbytes/blob/main/newsfragments/README.md)
 
 #### Cute Animal Picture
 
diff --git a/README.md b/README.md
index 4cb5fad..92a4a04 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ The version format for this repo is `{major}.{minor}.{patch}` for stable, and
 
 To issue the next version in line, specify which part to bump,
 like `make release bump=minor` or `make release bump=devnum`. This is typically done from the
-master branch, except when releasing a beta (in which case the beta is released from master,
+main branch, except when releasing a beta (in which case the beta is released from main,
 and the previous stable branch is released from said branch).
 
 If you are in a beta version, `make release bump=stage` will switch to a stable.
diff --git a/newsfragments/40.internal.rst b/newsfragments/40.internal.rst
new file mode 100644
index 0000000..6559493
--- /dev/null
+++ b/newsfragments/40.internal.rst
@@ -0,0 +1 @@
+Change the name of ``master`` branch to ``main``
diff --git a/pyproject.toml b/pyproject.toml
index ed8223b..5df2b4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ log_format = "%(levelname)8s  %(asctime)s  %(filename)20s  %(message)s"
 log_date_format = "%m-%d %H:%M:%S"
 
 [tool.towncrier]
-# Read https://github.com/ethereum/hexbytes/blob/master/newsfragments/README.md for instructions
+# Read https://github.com/ethereum/hexbytes/blob/main/newsfragments/README.md for instructions
 package = "hexbytes"
 filename = "docs/release_notes.rst"
 directory = "newsfragments"