diff --git a/.github/blunderbuss.yml b/.github/blunderbuss.yml
index 1a23ea42..2176b054 100644
--- a/.github/blunderbuss.yml
+++ b/.github/blunderbuss.yml
@@ -1,5 +1,5 @@
 # Configuration for the Blunderbuss GitHub app. For more info see
-# https://github.com/googleapis/repo-automation-bots/tree/master/packages/blunderbuss
+# https://github.com/googleapis/repo-automation-bots/tree/main/packages/blunderbuss
 assign_prs_by:
 - labels:
   - samples
diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index 76203b6d..215f962a 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -2,7 +2,7 @@ rebaseMergeAllowed: false
 squashMergeAllowed: true
 mergeCommitAllowed: false
 branchProtectionRules:
-  - pattern: master
+  - pattern: main
     isAdminEnforced: true
     requiredApprovingReviewCount: 1
     requiresCodeOwnerReviews: true
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3becb5c0..3932a70d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -1,7 +1,7 @@
 on:
   push:
     branches:
-    - master
+    - main
   pull_request:
 name: ci
 jobs:
diff --git a/.github/workflows/downstream.yaml b/.github/workflows/downstream.yaml
index 3ff62e52..0f1bc811 100644
--- a/.github/workflows/downstream.yaml
+++ b/.github/workflows/downstream.yaml
@@ -1,7 +1,7 @@
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 name: downstream
 jobs:
diff --git a/.github/workflows/upper-bound-check.yaml b/.github/workflows/upper-bound-check.yaml
index f4fac6ac..45cb8b9d 100644
--- a/.github/workflows/upper-bound-check.yaml
+++ b/.github/workflows/upper-bound-check.yaml
@@ -1,7 +1,7 @@
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 name: upper-bound-check
 jobs:
diff --git a/README.md b/README.md
index 91ebe080..96a2554c 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,6 @@ Apache 2.0 - See [LICENSE][license] for more information.
 
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-shared-dependencies.svg
 [maven-version-link]: https://search.maven.org/search?q=g:com.google.cloud%20AND%20a:google-cloud-shared-dependencies&core=gav
-[contributing]: https://github.com/googleapis/java-shared-dependencies/blob/master/CONTRIBUTING.md
-[code-of-conduct]: https://github.com/googleapis/java-shared-dependencies/blob/master/CODE_OF_CONDUCT.md#contributor-code-of-conduct
-[license]: https://github.com/googleapis/java-shared-dependencies/blob/master/LICENSE
+[contributing]: https://github.com/googleapis/java-shared-dependencies/blob/main/CONTRIBUTING.md
+[code-of-conduct]: https://github.com/googleapis/java-shared-dependencies/blob/main/CODE_OF_CONDUCT.md#contributor-code-of-conduct
+[license]: https://github.com/googleapis/java-shared-dependencies/blob/main/LICENSE