diff --git a/dev.yml b/dev.yml
index 3ab329144567791550b98bdccf98026fbcc2e858..a698b9031c7f73c576b7331183996b903a7f46cd 100644
--- a/dev.yml
+++ b/dev.yml
@@ -1,3 +1,5 @@
+version: "3"
+
 services:
   dolibarr:
       ports:
diff --git a/docker-compose.yml b/docker-compose.yml
index 3af1bfae5982109e1a08bd0bb323e60dc3961889..a8f9f02e29e969cee23c2e1cb797292ee4717a51 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,3 +1,5 @@
+version: "3"
+
 services:
   mariadb:
       image: mariadb:latest
diff --git a/expose_mariadb.yml b/expose_mariadb.yml
index 3cbf2c9d4446a79b1e2604975f3652037d4d17a9..28fcd714b66fa04b7f92717f09f9c488a6228198 100644
--- a/expose_mariadb.yml
+++ b/expose_mariadb.yml
@@ -1,3 +1,5 @@
+version: "3"
+
 services:
   mariadb:
       ports: