diff --git a/.github/workflows/check-styles.yml b/.github/workflows/check-styles.yml
index bc80ada9..82f6e289 100644
--- a/.github/workflows/check-styles.yml
+++ b/.github/workflows/check-styles.yml
@@ -4,9 +4,9 @@ name: Style checking
 
 on:
   push:
-    branches: [master]
+    branches: [main]
   pull_request:
-    branches: [master]
+    branches: [main]
 
 jobs:
   ruff-format:
diff --git a/.github/workflows/get_version.yml b/.github/workflows/get_version.yml
index a5d668fe..5bb30f74 100644
--- a/.github/workflows/get_version.yml
+++ b/.github/workflows/get_version.yml
@@ -4,11 +4,11 @@ name: GetVersion
 
 # Controls when the action will run. 
 on:
-  # Triggers the workflow on push or pull request events but only for the master branch
+  # Triggers the workflow on push or pull request events but only for the main branch
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index d62720fa..936dc7d7 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -5,9 +5,9 @@ name: Python package
 
 on:
   push:
-    branches: [master]
+    branches: [main]
   pull_request:
-    branches: [master]
+    branches: [main]
 
 jobs:
   build:
diff --git a/README.md b/README.md
index 9d1294d5..5f25566b 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 ![Python package](https://github.com/Electrostatics/pdb2pqr/workflows/Python%20package/badge.svg)
-[![codecov](https://codecov.io/gh/Electrostatics/pdb2pqr/branch/master/graph/badge.svg)](https://codecov.io/gh/Electrostatics/pdb2pqr)
+[![codecov](https://codecov.io/gh/Electrostatics/pdb2pqr/branch/main/graph/badge.svg)](https://codecov.io/gh/Electrostatics/pdb2pqr)
 [![Documentation Status](https://readthedocs.org/projects/pdb2pqr/badge/?version=latest)](https://pdb2pqr.readthedocs.io/en/latest/?badge=latest)
 
 PDB2PQR
diff --git a/docs/source/extending.rst b/docs/source/extending.rst
index a740d0cf..3e5e3208 100644
--- a/docs/source/extending.rst
+++ b/docs/source/extending.rst
@@ -30,7 +30,7 @@ Adding new functionality
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
 PDB2PQR welcomes new contributions; the software API is documented in :ref:`api-label`.
-To contribute code, submit a *pull request* against the master branch in the `PDB2PQR repository <https://github.com/Electrostatics/pdb2pqr>`_.
+To contribute code, submit a *pull request* against the main branch in the `PDB2PQR repository <https://github.com/Electrostatics/pdb2pqr>`_.
 Please be sure to run PDB2PQR tests, as described in :ref:`testing-label`, before submitting new code.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^