diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index 344429a9c3..141cd600c5 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   ec-cube:
     volumes:
diff --git a/docker-compose.mysql.yml b/docker-compose.mysql.yml
index 0683313627..c955b11c19 100644
--- a/docker-compose.mysql.yml
+++ b/docker-compose.mysql.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 volumes:
   mysql-database:
     driver: local
diff --git a/docker-compose.owaspzap.daemon.yml b/docker-compose.owaspzap.daemon.yml
index db7e0547ac..94156ee7f4 100644
--- a/docker-compose.owaspzap.daemon.yml
+++ b/docker-compose.owaspzap.daemon.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   zap:
     command: bash -c "zap.sh -daemon -addonupdate -addoninstall help_ja_JP -addoninstall wappalyzer -addoninstall sequence -addonuninstall hud -configfile /zap/wrk/options.properties -certpubdump /zap/wrk/owasp_zap_root_ca.cer -host 0.0.0.0 -port 8090 -config api.addrs.addr.name=.* -config api.addrs.addr.regex=true"
diff --git a/docker-compose.owaspzap.yml b/docker-compose.owaspzap.yml
index 0817b4763a..8c32eef78d 100644
--- a/docker-compose.owaspzap.yml
+++ b/docker-compose.owaspzap.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   ec-cube:
     environment:
diff --git a/docker-compose.pgsql.yml b/docker-compose.pgsql.yml
index c7b295ca2b..b34aa6a794 100644
--- a/docker-compose.pgsql.yml
+++ b/docker-compose.pgsql.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 volumes:
   pg-database:
     driver: local
diff --git a/docker-compose.yml b/docker-compose.yml
index a55a2e74ba..6a5b27d483 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 networks:
   backend:
     driver: bridge