diff --git a/Dockerfile b/Dockerfile
index cf646b60..aa4b00cf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -106,6 +106,7 @@ RUN groupadd -g 751 cgts && \
         python-testrepository \
         python-tox \
         python-yaml \
+        python2-ruamel-yaml \
         postgresql \
         qemu-kvm \
         quilt \