diff --git a/.github/workflows/DowngradeCI.yml b/.github/workflows/DowngradeCI.yml
new file mode 100644
index 00000000..0b2b58c0
--- /dev/null
+++ b/.github/workflows/DowngradeCI.yml
@@ -0,0 +1,22 @@
+name: DowngradeCI
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        version: ['1']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.version }}
+      - uses: cjdoris/julia-downgrade-compat-action@v1
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1