diff --git a/.github/workflows/auto-tag.yml b/.github/workflows/auto-tag.yml
index 475583e..4ac8a02 100644
--- a/.github/workflows/auto-tag.yml
+++ b/.github/workflows/auto-tag.yml
@@ -3,7 +3,7 @@ name: Auto Tag on Version Bump
 on:
   push:
     branches:
-      - master
+      - main
     paths:
       - VERSION
 
diff --git a/.github/workflows/check-for-updates.yml b/.github/workflows/check-for-updates.yml
index 119d1d0..35b01aa 100644
--- a/.github/workflows/check-for-updates.yml
+++ b/.github/workflows/check-for-updates.yml
@@ -110,6 +110,6 @@ jobs:
         run: |
           gh pr create --title "Update tzdata to version $TZDATA_VERSION" \
             --body "$TZDATA_NEWS" \
-            --base master \
+            --base main \
             --head $(git rev-parse --abbrev-ref HEAD) \
             --label "automatic-updates"
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index af8e595..e09241f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -3,7 +3,7 @@ name: tzdata contents
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
   workflow_dispatch: