diff --git a/.yamllint b/.yamllint
index da54cad..2522155 100644
--- a/.yamllint
+++ b/.yamllint
@@ -2,6 +2,7 @@
 extends: default
 
 rules:
+  line-length: disable
   truthy:
     allowed-values:
       - 'true'
diff --git a/host-krypton.yml b/host-krypton.yml
index e260480..045204f 100644
--- a/host-krypton.yml
+++ b/host-krypton.yml
@@ -29,7 +29,7 @@
       vars:
         dehydrated_contact_email: "{{ server_admin }}"
         dehydrated_domains:
-        - name: entities-validation.svc.n39.eu
+          - name: entities-validation.svc.n39.eu
     - role: penguineer.dehydrated_cron
 
   tasks:
diff --git a/host-pottwal.yml b/host-pottwal.yml
index d2c9271..efdb0ec 100644
--- a/host-pottwal.yml
+++ b/host-pottwal.yml
@@ -95,7 +95,6 @@
           TZ: "{{ timezone }}"
 
 
-
     - name: Ensure container for shlink is running
       docker_container:
         name: shlink
@@ -413,7 +412,7 @@
           GF_SECURITY_ADMIN_PASSWORD: "{{ grafana_admin_password }}"
           GF_USERS_ALLOW_SIGN_UP: "false"
           GF_INSTALL_PLUGINS: "flant-statusmap-panel,ae3e-plotly-panel"
-          
+
     - name: Setup proxy site grafana.n39.eu
       include_role:
         name: setup_http_site_proxy
diff --git a/host-tau.yml b/host-tau.yml
index 147ee7c..d640cde 100644
--- a/host-tau.yml
+++ b/host-tau.yml
@@ -170,4 +170,3 @@
           - "53:53/udp"
         env:
           TZ: "{{ timezone }}"
-
diff --git a/host_vars/hobbes.n39.eu/vars.yml b/host_vars/hobbes.n39.eu/vars.yml
index ad3650e..39f5c6f 100644
--- a/host_vars/hobbes.n39.eu/vars.yml
+++ b/host_vars/hobbes.n39.eu/vars.yml
@@ -1,3 +1,4 @@
+---
 server_admin: "admin+hobbes@netz39.de"
 mac: "b8:27:eb:f9:43:43"
 kiosk_user: pi
diff --git a/host_vars/krypton.n39.eu/vars.yml b/host_vars/krypton.n39.eu/vars.yml
index 51abc0c..9fbed9c 100644
--- a/host_vars/krypton.n39.eu/vars.yml
+++ b/host_vars/krypton.n39.eu/vars.yml
@@ -1,2 +1,3 @@
+---
 server_admin: "admin+krypton@netz39.de"
 ldap_admin_password: "{{ vault_ldap_admin_password }}"
diff --git a/host_vars/localhost/vars.yml b/host_vars/localhost/vars.yml
index cd3c13d..fd4d599 100644
--- a/host_vars/localhost/vars.yml
+++ b/host_vars/localhost/vars.yml
@@ -1,3 +1,4 @@
+---
 grafana_users:
   - name: Netz39
     email: accounts+grafana@netz39.de
diff --git a/host_vars/platon.n39.eu/vars.yml b/host_vars/platon.n39.eu/vars.yml
index 2f04ab2..294efed 100644
--- a/host_vars/platon.n39.eu/vars.yml
+++ b/host_vars/platon.n39.eu/vars.yml
@@ -1,3 +1,4 @@
+---
 server_admin: "admin+platon@netz39.de"
 mac: "b8:27:eb:8f:98:2f"
 gatekeeper_user: pi
diff --git a/host_vars/pottwal.n39.eu/vars.yml b/host_vars/pottwal.n39.eu/vars.yml
index 1139a67..c70ce80 100644
--- a/host_vars/pottwal.n39.eu/vars.yml
+++ b/host_vars/pottwal.n39.eu/vars.yml
@@ -1,3 +1,4 @@
+---
 server_admin: "admin+pottwal@netz39.de"
 ansible_python_interpreter: /usr/bin/python3
 data_dir: "/srv/data"
@@ -38,4 +39,4 @@ uptimekuma_host_port: 8085
 
 grafana_host_port: 8089
 grafana_domain_name: grafana.n39.eu
-grafana_admin_password: "{{ vault_grafana_admin_password }}"
\ No newline at end of file
+grafana_admin_password: "{{ vault_grafana_admin_password }}"
diff --git a/host_vars/radon.n39.eu/vars.yml b/host_vars/radon.n39.eu/vars.yml
index db62d9e..fc9bff6 100644
--- a/host_vars/radon.n39.eu/vars.yml
+++ b/host_vars/radon.n39.eu/vars.yml
@@ -1,3 +1,4 @@
+---
 server_admin: "admin+radon@netz39.de"
 pwr_meter_amqp_user: "pwr-meter"
 pwr_meter_amqp_pass: "{{ vault_pwr_meter_amqp_pass }}"
diff --git a/host_vars/tau.netz39.de/vars.yml b/host_vars/tau.netz39.de/vars.yml
index ac0c976..7fb2b4d 100644
--- a/host_vars/tau.netz39.de/vars.yml
+++ b/host_vars/tau.netz39.de/vars.yml
@@ -1,2 +1,3 @@
+---
 server_admin: "admin+tau@netz39.de"
 mysql_root_pw: "{{ vault_mysql_root_pw }}"
diff --git a/host_vars/unicorn.n39.eu/vars.yml b/host_vars/unicorn.n39.eu/vars.yml
index 467d832..9a7141f 100644
--- a/host_vars/unicorn.n39.eu/vars.yml
+++ b/host_vars/unicorn.n39.eu/vars.yml
@@ -1 +1,2 @@
-server_admin: "admin+unicorn@netz39.de"
\ No newline at end of file
+---
+server_admin: "admin+unicorn@netz39.de"
diff --git a/setup-ssh.yml b/setup-ssh.yml
index 2d8c594..e5297a3 100644
--- a/setup-ssh.yml
+++ b/setup-ssh.yml
@@ -21,4 +21,4 @@
         insertbefore: BOF
         regexp: '^Include'
         line: Include config.d/n39_config
-      delegate_to: localhost
\ No newline at end of file
+      delegate_to: localhost