diff --git a/.github/workflows/ci-dispatcher-1.0.x.yml b/.github/workflows/ci-dispatcher-1.0.x.yml
deleted file mode 100644
index 4e9702b8..00000000
--- a/.github/workflows/ci-dispatcher-1.0.x.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-name: CI Dispatcher (1.0.x)
-
-on:
-  schedule:
-    - cron: '0 10 * * */3' # Once every 3 day at 10am UTC
-  workflow_dispatch:
-
-jobs:
-  dispatch_ci_workflow:
-    name: Dispatch CI workflow
-    if: github.repository == 'spring-projects/spring-pulsar'
-    strategy:
-      matrix:
-        # List of active maintenance branches.
-        branch: [ 1.0.x ]
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v4
-      with:
-        fetch-depth: 1
-    - name: Dispatch
-      env:
-        GH_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
-      run: gh workflow run ci.yml -r ${{ matrix.branch }}
diff --git a/.github/workflows/ci-pr.yml b/.github/workflows/ci-pr.yml
index 85d6f877..b6ca7a61 100644
--- a/.github/workflows/ci-pr.yml
+++ b/.github/workflows/ci-pr.yml
@@ -5,7 +5,6 @@ on:
     branches:
       - 'main'
       - '1.1.x'
-      - '1.0.x'
     paths-ignore:
       - '.github/**'
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fd1ff919..c05eb0b6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,6 @@ on:
     branches:
       - 'main'
       - '1.1.x'
-      - '1.0.x'
     paths-ignore:
       - '.github/**'
   schedule:
diff --git a/.github/workflows/trivy-scan-dispatcher-1.0.x.yml b/.github/workflows/trivy-scan-dispatcher-1.0.x.yml
deleted file mode 100644
index 15d972b3..00000000
--- a/.github/workflows/trivy-scan-dispatcher-1.0.x.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-name: Trivy Vulnerability Scan (Repo mode) Dispatcher (1.0.x)
-
-on:
-  schedule:
-    - cron: '0 15 * * */3' # Once every 3 day at 15:00 UTC
-  workflow_dispatch:
-
-jobs:
-  dispatch_trivy_workflow:
-    name: Dispatch scan workflow
-    if: github.repository == 'spring-projects/spring-pulsar'
-    strategy:
-      matrix:
-        # List of active maintenance branches.
-        branch: [ 1.0.x ]
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 1
-      - name: Dispatch
-        env:
-          GH_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
-        run: gh workflow run trivy-scan.yml -r ${{ matrix.branch }}