diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 8f87b21..f4234ac 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -41,11 +41,11 @@ jobs:
         shell: julia --color=yes --project {0}
         run: |
           using Pkg
-          Pkg.add(PackageSpec(; name="AWS", version="${{ matrix.aws-jl-version }}"))
+          aws_pkg = PackageSpec(; name="AWS", version="${{ matrix.aws-jl-version }}")
+          Pkg.add(aws_pkg)
+          Pkg.pin(aws_pkg)
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
-        with:
-          allow_reresolve: ${{ matrix.aws-jl-version == 'latest' }}
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
         with: