diff --git a/.github/workflows/auto-tag.yml b/.github/workflows/auto-tag.yml
index 6787e71..76df36d 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 7569945..ff11af2 100644
--- a/.github/workflows/check-for-updates.yml
+++ b/.github/workflows/check-for-updates.yml
@@ -115,6 +115,6 @@ 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 842e181..57ee3d4 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_call:
   workflow_dispatch: