diff --git a/cadvisor/docker-compose.yml b/cadvisor/docker-compose.yml
index 6cfc3a6..f2f3fbc 100644
--- a/cadvisor/docker-compose.yml
+++ b/cadvisor/docker-compose.yml
@@ -1,4 +1,3 @@
-version: "3"
 services:
   cadvisor:
     container_name: cadvisor
diff --git a/grafana/docker-compose.yml b/grafana/docker-compose.yml
index 9f55a94..c3c8d98 100644
--- a/grafana/docker-compose.yml
+++ b/grafana/docker-compose.yml
@@ -1,4 +1,3 @@
-version: "3.8"
 services:
   grafana:
     image: grafana/grafana
diff --git a/nginx-proxy-manager/docker-compose.yml b/nginx-proxy-manager/docker-compose.yml
index ed2fc82..80ca7da 100755
--- a/nginx-proxy-manager/docker-compose.yml
+++ b/nginx-proxy-manager/docker-compose.yml
@@ -1,4 +1,3 @@
-version: "3"
 services:
   app:
     container_name: nginx-proxy-manager
diff --git a/prometheus/docker-compose.yml b/prometheus/docker-compose.yml
index 213378a..a001f2b 100644
--- a/prometheus/docker-compose.yml
+++ b/prometheus/docker-compose.yml
@@ -1,4 +1,3 @@
-version: "3.8"
 services:
   prometheus:
     image: prom/prometheus