diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/pythonapp.yml
index 5154b24..37b6fed 100644
--- a/.github/workflows/pythonapp.yml
+++ b/.github/workflows/pythonapp.yml
@@ -22,6 +22,7 @@ jobs:
         python-version: 3.12.8
     - name: Install dependencies
       run: |
+        python -m pip install --upgrade cython
         python -m pip install --upgrade setuptools git+https://github.com/UTA-REST/PyGasMix --user
         python -m pip install --upgrade  git+https://github.com/UTA-REST/PyBoltz_Test_Data --user