diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 8a3fb3b..27f13ea 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -34,6 +34,9 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+    - name: Update
+      run: |
+        sudo apt update
     - name: Install CGAL 5
       run: |
         sudo apt install -y libcgal-dev