diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d7b9ec2..c3f4681 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -15,8 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         julia-version:
-          - 1
-        julia-arch: [x64]
+          - '1'
         os:
           - ubuntu-latest
           - windows-latest
@@ -24,10 +23,10 @@ jobs:
         include:
           - os: ubuntu-latest
             julia-arch: x64
-            julia-version: 1.6
+            julia-version: '1.6'
           - os: ubuntu-latest
             julia-arch: x64
-            julia-version: nightly
+            julia-version: 'pre'
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
@@ -39,7 +38,7 @@ jobs:
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v5
         with:
-          file: lcov.info
+          files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}
 
       - uses: coverallsapp/github-action@main