diff --git a/.github/workflows/python-package-run-tests-linux-py38.yml b/.github/workflows/python-package-run-tests-linux-py38.yml
index 49ca85e..439f80b 100644
--- a/.github/workflows/python-package-run-tests-linux-py38.yml
+++ b/.github/workflows/python-package-run-tests-linux-py38.yml
@@ -25,8 +25,10 @@ jobs:
     - name: Install dependencies
       run: |
         python --version
-        conda install -c conda-forge numpy pygalmesh
-        conda install -c conda-forge meshio numba
+        conda install python=3.9
+        python --version
+        conda install -c conda-forge pygalmesh
+        conda install -c conda-forge numpy meshio numba
         conda install -c conda-forge scipy pycifrw dill xfab
         conda install -c conda-forge netcdf4 h5py pandas matplotlib
         python -m pip install .