diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 7489251a..1dd54d56 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -7,22 +7,6 @@ registries:
 
 updates:
   # Gradle
-  - package-ecosystem: gradle
-    target-branch: 1.3.x
-    directory: /
-    schedule:
-      interval: daily
-      time: '03:00'
-      timezone: Etc/UTC
-    labels:
-      - 'type: dependency-upgrade'
-    registries:
-      - spring-milestones
-    ignore:
-      - dependency-name: '*'
-        update-types:
-          - version-update:semver-major
-          - version-update:semver-minor
   - package-ecosystem: gradle
     target-branch: 1.4.x
     directory: /
@@ -68,13 +52,6 @@ updates:
       - spring-milestones
 
   # GitHub Actions
-  - package-ecosystem: github-actions
-    target-branch: 1.3.x
-    directory: /
-    schedule:
-      interval: weekly
-    labels:
-      - 'type: task'
   - package-ecosystem: github-actions
     target-branch: 1.4.x
     directory: /
@@ -105,13 +82,6 @@ updates:
       - 'type: task'
 
   # NPM
-  - package-ecosystem: npm
-    target-branch: 1.3.x
-    directory: /docs
-    schedule:
-      interval: weekly
-    labels:
-      - 'type: task'
   - package-ecosystem: npm
     target-branch: 1.4.x
     directory: /docs
diff --git a/.github/workflows/release-scheduler.yml b/.github/workflows/release-scheduler.yml
index 8eb27852..da6b35f9 100644
--- a/.github/workflows/release-scheduler.yml
+++ b/.github/workflows/release-scheduler.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         # List of active maintenance branches.
-        branch: [ main, 1.3.x, 1.4.x, 1.5.x ]
+        branch: [ main, 1.5.x, 1.4.x ]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
diff --git a/.github/workflows/update-antora-ui-spring.yml b/.github/workflows/update-antora-ui-spring.yml
index 6914f328..944663c3 100644
--- a/.github/workflows/update-antora-ui-spring.yml
+++ b/.github/workflows/update-antora-ui-spring.yml
@@ -16,7 +16,7 @@ jobs:
     name: Update on Supported Branches
     strategy:
       matrix:
-        branch: [ '1.3.x', 'main' ]
+        branch: [ 'main', '1.5.x', '1.4.x' ]
     steps:
       - uses: spring-io/spring-doc-actions/update-antora-spring-ui@e28269199d1d27975cf7f65e16d6095c555b3cd0
         name: Update