diff --git a/setup.py b/setup.py
index 18661e95..00e3755f 100644
--- a/setup.py
+++ b/setup.py
@@ -38,6 +38,7 @@ setup(name='fdroidserver',
           'pyasn1-modules',
           'python-vagrant',
           'PyYAML',
+          'ruamel.yaml',
           'requests < 2.11',
           'docker-py == 1.9.0',
       ],