diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 4261afc..aaf3477 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -19,11 +19,11 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.0'
           - '1.3'
           - '1.6'
           - '1.7'
           - '1.8'
+          - '1.9'
           - 'nightly'
         os:
           - ubuntu-latest
@@ -36,7 +36,7 @@ jobs:
           - os: macOS-latest
             arch: x86
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
@@ -55,7 +55,7 @@ jobs:
       contents: write
       statuses: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'