diff --git a/pkg/adlin-tuto1/build.yml b/pkg/adlin-tuto1/build.yml
index eaf8c64..d5637f6 100644
--- a/pkg/adlin-tuto1/build.yml
+++ b/pkg/adlin-tuto1/build.yml
@@ -1 +1,2 @@
 image: adlin-tuto1
+network: true
diff --git a/pkg/challenge/build.yml b/pkg/challenge/build.yml
index 71c083f..a5566a2 100644
--- a/pkg/challenge/build.yml
+++ b/pkg/challenge/build.yml
@@ -1 +1,2 @@
 image: challenge
+network: true
diff --git a/pkg/debian-tuto2/build.yml b/pkg/debian-tuto2/build.yml
index a3072ca..2db4222 100644
--- a/pkg/debian-tuto2/build.yml
+++ b/pkg/debian-tuto2/build.yml
@@ -1 +1,2 @@
 image: adlin-tuto2
+network: true
diff --git a/pkg/debian-tuto3/build.yml b/pkg/debian-tuto3/build.yml
index c78afe4..cd0c17d 100644
--- a/pkg/debian-tuto3/build.yml
+++ b/pkg/debian-tuto3/build.yml
@@ -1 +1,2 @@
 image: adlin-tuto3
+network: true
diff --git a/pkg/iscsi-target/build.yml b/pkg/iscsi-target/build.yml
index bceaee9..9e89775 100644
--- a/pkg/iscsi-target/build.yml
+++ b/pkg/iscsi-target/build.yml
@@ -1 +1,2 @@
 image: iscsi-target
+network: true
diff --git a/pkg/monit/build.yml b/pkg/monit/build.yml
index ca20254..412a8ef 100644
--- a/pkg/monit/build.yml
+++ b/pkg/monit/build.yml
@@ -1 +1,2 @@
 image: monit
+network: true
diff --git a/pkg/nsd/build.yml b/pkg/nsd/build.yml
index cc47ecc..7799a07 100644
--- a/pkg/nsd/build.yml
+++ b/pkg/nsd/build.yml
@@ -1 +1,2 @@
 image: nsd
+network: true
diff --git a/pkg/postfix/build.yml b/pkg/postfix/build.yml
index e939cae..69c195a 100644
--- a/pkg/postfix/build.yml
+++ b/pkg/postfix/build.yml
@@ -1 +1,2 @@
 image: postfix
+network: true
diff --git a/pkg/tftpd/build.yml b/pkg/tftpd/build.yml
index 1be1cfe..ab52a30 100644
--- a/pkg/tftpd/build.yml
+++ b/pkg/tftpd/build.yml
@@ -1 +1,2 @@
 image: tftpd
+network: true
diff --git a/pkg/tinydeb/build.yml b/pkg/tinydeb/build.yml
index 1e325cd..a3dc509 100644
--- a/pkg/tinydeb/build.yml
+++ b/pkg/tinydeb/build.yml
@@ -1 +1,2 @@
 image: tinydeb
+network: true
diff --git a/pkg/unbound/build.yml b/pkg/unbound/build.yml
index a94adb5..dfeab06 100644
--- a/pkg/unbound/build.yml
+++ b/pkg/unbound/build.yml
@@ -1 +1,2 @@
 image: unbound
+network: true