diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8a64e772..351edd17 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Install python dependencies
         run: |
          sudo apt-get update
-         sudo apt-get install -y python3-setuptools python3-virtualenv python3-pip
+         sudo apt-get install -y python3-setuptools python3-virtualenv python3-pip libxml2 python3-lxml libxslt-dev 
          pip install --upgrade pip
          make install-python
       - name: Test
diff --git a/requirements.txt b/requirements.txt
index 095193da..5883a65b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -80,7 +80,7 @@ python-dotenv
 python-frontmatter
 python-markdown-maker
 python-slugify
-PyYAML
+PyYAML==6.0.1
 regex
 requests
 requests-oauthlib