diff --git a/playbooks/maintain-github-mirror/run.yaml b/playbooks/maintain-github-mirror/run.yaml
index 73c2a6589a..0171f4d671 100644
--- a/playbooks/maintain-github-mirror/run.yaml
+++ b/playbooks/maintain-github-mirror/run.yaml
@@ -11,7 +11,9 @@
 
     - name: Install dependencies
       pip:
-        name: PyGithub
+        name:
+          - PyGithub
+          - PyYAML
         virtualenv: "{{ ansible_user_dir }}/.venv"
         virtualenv_command: "{{ ensure_pip_virtualenv_command }}"