diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 01c91c6e..f9c87db3 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
 jobs:
   tests:
     runs-on: ubuntu-16.04
@@ -244,10 +244,10 @@ jobs:
       - name: Reinstall ICAT Server
         run: cd /home/runner/install/icat.server; ./setup -vv install
 
-      - name: Checkout DataGateway API (master)
+      - name: Checkout DataGateway API (default branch)
         uses: actions/checkout@v2
         with:
-          ref: master
+          ref: ${{ github.event.repository.default_branch }}
 
       - name: Create config.json
         run: cp datagateway_api/config.json.example datagateway_api/config.json
@@ -256,10 +256,10 @@ jobs:
 
       - name: Add dummy data to icatdb
         run: poetry run python -m util.icat_db_generator
-      - name: Get SQL dump of dummy data from master's generator script
-        run: mysqldump -picatdbuserpw -uicatdbuser --skip-comments icatdb > ~/generator_script_dump_master.sql
+      - name: Get SQL dump of dummy data from main's generator script
+        run: mysqldump -picatdbuserpw -uicatdbuser --skip-comments icatdb > ~/generator_script_dump_main.sql
 
-      # Tests that the generator script produces the same data as is produced with master's version
+      # Tests that the generator script produces the same data as is produced with main's version
 
       # NOTE: If a delibrate change is made to the script that will change the data generated,
       # the diff (and therefore this job) will fail. If this is the case, don't be alarmed.
@@ -269,4 +269,4 @@ jobs:
       # problem with the changes made that will make the generator script's data
       # different to SciGateway preprod
       - name: Diff SQL dumps
-        run: diff -s ~/generator_script_dump_master.sql ~/generator_script_dump_1.sql
+        run: diff -s ~/generator_script_dump_main.sql ~/generator_script_dump_1.sql
diff --git a/README.md b/README.md
index ad6e19fa..7a4bf9ce 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
-[![Build Status](https://github.com/ral-facilities/datagateway-api/workflows/CI/badge.svg?branch=master)](https://github.com/ral-facilities/datagateway-api/actions?query=workflow%3A%22CI%22)
-[![Codecov](https://codecov.io/gh/ral-facilities/datagateway-api/branch/master/graph/badge.svg)](https://codecov.io/gh/ral-facilities/datagateway-api)
+[![Build Status](https://github.com/ral-facilities/datagateway-api/workflows/CI/badge.svg?branch=main)](https://github.com/ral-facilities/datagateway-api/actions?query=workflow%3A%22CI%22)
+[![Codecov](https://codecov.io/gh/ral-facilities/datagateway-api/branch/main/graph/badge.svg)](https://codecov.io/gh/ral-facilities/datagateway-api)