diff --git a/ci/spack_gcc.yaml b/ci/spack_gcc.yaml
index 566d47cd7..ad8965add 100644
--- a/ci/spack_gcc.yaml
+++ b/ci/spack_gcc.yaml
@@ -3,9 +3,9 @@ spack:
   packages:
     all:
       providers:
-        blas: openblas
-        lapack: openblas
-        mpi: mpich
+        blas: [openblas]
+        lapack: [openblas]
+        mpi: [mpich]
       compiler:
         - gcc@13
   specs:
diff --git a/ci/spack_intel.yaml b/ci/spack_intel.yaml
index cba5974d6..3d0d51953 100644
--- a/ci/spack_intel.yaml
+++ b/ci/spack_intel.yaml
@@ -3,7 +3,7 @@ spack:
   packages:
     all:
       providers:
-        mpi: intel-oneapi-mpi
+        mpi: [intel-oneapi-mpi]
       compiler:
         - intel
   specs: