diff --git a/.github/workflows/check-go-versions.yml b/.github/workflows/check-go-versions.yml
index 0e3b322..3ef8031 100644
--- a/.github/workflows/check-go-versions.yml
+++ b/.github/workflows/check-go-versions.yml
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        branch: ["v3"]
+        branch: ["v3", "v4"]
       fail-fast: false
     env:
       officialLatestVersion: ${{ needs.check-go-eol.outputs.latest }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3ff80f7..3df7d75 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,11 +1,11 @@
 name: Build and Test SDK
 on:
   push:
-    branches: [ 'v3', 'feat/**' ]
+    branches: [ 'v4', 'feat/**' ]
     paths-ignore:
       - '**.md' # Don't run CI on markdown changes.
   pull_request:
-    branches: [ 'v3', 'feat/**'  ]
+    branches: [ 'v4', 'feat/**'  ]
     paths-ignore:
       - '**.md'
 
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index 95b5e4d..b237186 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -3,7 +3,7 @@ name: Run Release Please
 on:
   push:
     branches:
-      - v3
+      - v4
   workflow_dispatch:
 
 jobs:
@@ -15,4 +15,4 @@ jobs:
     steps:
       - uses: googleapis/release-please-action@16a9c90856f42705d54a6fda1823352bdc62cf38 # v4.4.0
         with:
-          target-branch: v3
+          target-branch: v4