diff --git a/.github/workflows/tox.yaml b/.github/workflows/tox.yaml
index ce816f9..b28d2dd 100644
--- a/.github/workflows/tox.yaml
+++ b/.github/workflows/tox.yaml
@@ -19,7 +19,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        sudo apt-get install -q --yes libxml2-dev libxslt1-dev
+        sudo apt-get install -q --yes libxml2-dev libxslt1-dev libyaml-dev
         python -m pip install --upgrade pip
         pip install tox tox-gh-actions
     - name: Lint with tox