diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 636bd04..5db0bb2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,7 @@ jobs:
         python-version: ["3.10"]
     steps:
     - uses: actions/checkout@v3
+    - uses: mpi4py/setup-mpi@v1
     - name: Setup PDM
       uses: pdm-project/setup-pdm@v3
       with: