diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 53f53a8..bf71ad9 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -19,13 +19,14 @@ jobs:
       matrix:
         version:
           - '1.8'
+          - '1'
           - 'nightly'
         os:
           - ubuntu-latest
         arch:
           - x64
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}