diff --git a/.appveyor.yml b/.appveyor.yml
index d57e0cb8..69d6e6c6 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -8,10 +8,11 @@ skip_branch_with_pr: true
 # to only build commits from pull requests
 branches:
   only:
+    - main
     - master
 
 # Only run AppVeyor on commits that modify at least one of the following files
-# Delete these lines to run AppVeyor on all master branch commits
+# Delete these lines to run AppVeyor on all main/master branch commits
 only_commits:
   files:
     - .appveyor.yml
diff --git a/.github/workflows/manubot.yaml b/.github/workflows/manubot.yaml
index 9a2b89b2..9a7d5766 100644
--- a/.github/workflows/manubot.yaml
+++ b/.github/workflows/manubot.yaml
@@ -2,9 +2,11 @@ name: Manubot
 on:
   push:
     branches:
+      - main
       - master
   pull_request:
     branches:
+      - main
       - master
 jobs:
   manubot:
@@ -14,23 +16,27 @@ jobs:
       GITHUB_PULL_REQUEST_SHA: ${{ github.event.pull_request.head.sha }}
       SPELLCHECK: true
     steps:
-      - name: Set Environment Variables
-        run: |
-          TRIGGERING_SHA=${GITHUB_PULL_REQUEST_SHA:-$GITHUB_SHA}
-          echo "TRIGGERING_SHA_7=${TRIGGERING_SHA::7}" >> $GITHUB_ENV
-          echo "TRIGGERING_SHA: $TRIGGERING_SHA"
       - name: Checkout Repository
         uses: actions/checkout@v2
         with:
           # fetch entire commit history to support get_rootstock_commit
           fetch-depth: 0
+      - name: Set Environment Variables
+        run: |
+          TRIGGERING_SHA=${GITHUB_PULL_REQUEST_SHA:-$GITHUB_SHA}
+          echo "TRIGGERING_SHA_7=${TRIGGERING_SHA::7}" >> $GITHUB_ENV
+          echo "TRIGGERING_SHA: $TRIGGERING_SHA"
+          DEFAULT_BRANCH=$(git remote show origin | grep --perl-regexp --only-matching "(?<=HEAD branch: ).+")
+          echo "DEFAULT_BRANCH=${DEFAULT_BRANCH}" >> $GITHUB_ENV
+          echo "DEFAULT_BRANCH_REF=refs/heads/$DEFAULT_BRANCH" >> $GITHUB_ENV
+          echo "DEFAULT_BRANCH=$DEFAULT_BRANCH"
       - name: Cache
         uses: actions/cache@v1
         with:
           path: ci/cache
           key: ci-cache-${{ github.ref }}
           restore-keys: |
-            ci-cache-refs/heads/master
+            ci-cache-${{ env.DEFAULT_BRANCH_REF }}
       - name: Install Environment
         uses: conda-incubator/setup-miniconda@v2
         with:
@@ -53,7 +59,7 @@ jobs:
           name: manuscript-${{ github.run_id }}-${{ env.TRIGGERING_SHA_7 }}
           path: output
       - name: Deploy Manuscript
-        if: github.ref == 'refs/heads/master' && github.event_name == 'push' && !github.event.repository.fork
+        if: github.ref == env.DEFAULT_BRANCH_REF && github.event_name == 'push' && !github.event.repository.fork
         env:
           MANUBOT_ACCESS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           MANUBOT_SSH_PRIVATE_KEY: ${{ secrets.MANUBOT_SSH_PRIVATE_KEY }}
diff --git a/.travis.yml b/.travis.yml
index a8421383..cf4cbb61 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ services:
   - docker
 branches:
   only:
+    - main
     - master
 env:
   - SPELLCHECK=true
@@ -20,5 +21,6 @@ deploy:
   script: bash ci/deploy.sh
   skip_cleanup: true
   on:
+    # branch kept as master since travis deployment is legacy.
     branch: master
     condition: $TRAVIS_EVENT_TYPE = "push" && (-v MANUBOT_SSH_PRIVATE_KEY || "${!encrypted_*}" != "")
diff --git a/ci/deploy.sh b/ci/deploy.sh
index ed3d8a89..30a4f77e 100755
--- a/ci/deploy.sh
+++ b/ci/deploy.sh
@@ -12,7 +12,8 @@ REPO_SLUG=${TRAVIS_REPO_SLUG:-$GITHUB_REPOSITORY}
 COMMIT=${TRAVIS_COMMIT:-$GITHUB_SHA}
 CI_BUILD_WEB_URL=${CI_BUILD_WEB_URL:-$TRAVIS_BUILD_WEB_URL}
 CI_JOB_WEB_URL=${CI_JOB_WEB_URL:-$TRAVIS_JOB_WEB_URL}
-BRANCH=${TRAVIS_BRANCH:-master}
+BRANCH=${TRAVIS_BRANCH:-$DEFAULT_BRANCH}
+BRANCH=${BRANCH:-$main}
 
 # Add commit hash to the README
 OWNER_NAME="$(dirname "$REPO_SLUG")"