diff --git a/docker-compose/elk.yml b/docker-compose/elk.yml
index 67f13baee061a74ebd08320f1e9f2f9f3e72f646..25bb1b218669baebff50ddc830b049b691349f71 100644
--- a/docker-compose/elk.yml
+++ b/docker-compose/elk.yml
@@ -6,6 +6,7 @@
 #   - elk-configure-host: Configures the hosts's kernel to be able to use the ELK stack
 #   - elk: ELK stack
 #
+
 version: '2'
 
 volumes:
diff --git a/docker-compose/grafana.yml b/docker-compose/grafana.yml
index 29c93c52c4dc05849aad10fabac12712c12dd4d7..f298db2746961b7d30d2e147192d0dfc58530725 100644
--- a/docker-compose/grafana.yml
+++ b/docker-compose/grafana.yml
@@ -4,6 +4,7 @@
 # Defines:
 #   - grafana: Grafana
 #
+
 version: '2'
 
 #volumes:
diff --git a/docker-compose/jupyter.yml b/docker-compose/jupyter.yml
index 3c09c0c54d1f0321b81ab7b0fb26a3ea17eea24c..f32c6c1395fe6e41764e4569d472178620f731dd 100644
--- a/docker-compose/jupyter.yml
+++ b/docker-compose/jupyter.yml
@@ -7,6 +7,7 @@
 # Defines:
 #   - jupyter: Jupyter Notebook with iTango support
 #
+
 version: '2'
 
 services:
diff --git a/docker-compose/lofar-device-base.yml b/docker-compose/lofar-device-base.yml
index f27969fbe6f26cba44086d6362556138654deea9..f01faac2d2f41647708229106a895d3dad23c3e4 100644
--- a/docker-compose/lofar-device-base.yml
+++ b/docker-compose/lofar-device-base.yml
@@ -10,6 +10,7 @@
 # Requires:
 #   - tango.yml
 #
+
 version: '2'
 
 services:
diff --git a/docker-compose/prometheus.yml b/docker-compose/prometheus.yml
index 604f4bf4bde93dd6d68aaf7f3b1da2fd3f884e83..1e9ce6f1aa2cd050565f48a4b991865641fd1566 100644
--- a/docker-compose/prometheus.yml
+++ b/docker-compose/prometheus.yml
@@ -4,6 +4,7 @@
 # Defines:
 #   - prometheus: Prometheus
 #
+
 version: '2'
 
 services: