diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 2837ae3..64bf566 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-18.04]
+        os: [macos-latest, ubuntu-latest]
         python-version: [3.7, 3.8, 3.9, "3.10"]
 
     steps:
diff --git a/.github/workflows/pythonpublish.yml b/.github/workflows/pythonpublish.yml
index 73ac449..b2b39f5 100644
--- a/.github/workflows/pythonpublish.yml
+++ b/.github/workflows/pythonpublish.yml
@@ -21,7 +21,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel twine
+        pip install setuptools wheel twine pyyaml
     - name: Build and publish
       env:
         TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
diff --git a/setup.cfg b/setup.cfg
index ef22d32..f01cdfc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,6 +31,7 @@ install_requires =
     PyLD
     requests
     requests_cache
+    pyyaml
 
 test_requires =
     pytest >= 4.4.0