diff --git a/Dockerfile b/Dockerfile
index 782cfad99..c03cbaf82 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -62,7 +62,7 @@ RUN cat .git/HEAD > GIT_HEAD
 RUN TEST=true venv/bin/python -m unittest discover -f
 RUN TEST=true venv/bin/python -m test.registry_tests -f
 
-RUN PYTHONPATH=. venv/bin/alembic heads > ALEMBIC_HEAD
+RUN PYTHONPATH=. venv/bin/alembic heads | grep -E '^[0-9a-f]+ \(head\)$' > ALEMBIC_HEAD
 
 VOLUME ["/conf/stack", "/var/log", "/datastorage", "/tmp", "/conf/etcd"]