diff --git a/roles/mailman/tasks/main.yml b/roles/mailman/tasks/main.yml
index 0b76205efe..4b57746edb 100644
--- a/roles/mailman/tasks/main.yml
+++ b/roles/mailman/tasks/main.yml
@@ -70,6 +70,8 @@
   - python-vcrpy
   # django-compressor implicitely requires BeautifulSoup until v1.4
   - python-BeautifulSoup
+  # scripts
+  - python34-PyYAML
   tags:
   - packages