diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0836a4c..21e7fea 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,6 +2,6 @@ debian:
   stage: test
   image: debian:stable
   before_script:
-    - apt-get -qq update && apt-get -qq install -y python
+    - apt-get -qq update && apt-get -qq install -y python python-yaml
   script:
     - bash tests/run.sh break