diff --git a/.yamllint b/.yamllint
new file mode 100644
index 0000000000000000000000000000000000000000..cca80e2e16c9ee5298e8a5bcf9f77c130fdc3d8e
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,19 @@
+---
+
+extends: default
+
+rules:
+  comments-indentation:
+    level: warning
+  document-start:
+    level: error
+  empty-lines:
+    max: 1
+  empty-values:
+    forbid-in-flow-mappings: true
+    forbid-in-block-mappings: true
+  line-length:
+    level: warning
+  octal-values:
+    forbid-implicit-octal: true
+    level: warning
diff --git a/request-tracker/handlers/main.yml b/request-tracker/handlers/main.yml
index c9e3c4595492c259f165e04b6a2213805f8c5941..95e9e78ee33310a67cf4609bd377a49ae7ad4818 100644
--- a/request-tracker/handlers/main.yml
+++ b/request-tracker/handlers/main.yml
@@ -1,3 +1,5 @@
+---
+
 - name: restart RT
   service: name=rt4-fcgi state=restarted
 
diff --git a/request-tracker/tasks/main.yml b/request-tracker/tasks/main.yml
index fc78921a8a5e6b6975e0c450cbc34241fb1c1369..e0b3bc02b743c29997858fd03cb0d4801790a42f 100644
--- a/request-tracker/tasks/main.yml
+++ b/request-tracker/tasks/main.yml
@@ -1,21 +1,23 @@
-- name: Have the config folder 
+---
+
+- name: Have the config folder
   file:
     path: /etc/request-tracker4/RT_SiteConfig.d
     owner: root
     group: www-data
-    mode: 0750
+    mode: '0750'
     state: directory
-    recurse: yes
+    recurse: true
   tags:
     - rt
 
 - name: Have RT placeholder config installed
-  template: 
+  template:
     src: RT_SiteConfig.pm.j2
     dest: /etc/request-tracker4/RT_SiteConfig.pm
     owner: root
     group: www-data
-    mode: 0640
+    mode: '0640'
   tags:
     - rt
   notify:
@@ -27,8 +29,8 @@
     dest: "/etc/request-tracker4/RT_SiteConfig.d/{{ item }}"
     owner: root
     group: www-data
-    mode: 0640
-  with_items: 
+    mode: '0640'
+  with_items:
     - 40-timezone.pm
     - 50-debconf.pm
     - 60-logging.pm
@@ -54,7 +56,7 @@
     dest: /etc/dbconfig-common/request-tracker4.conf
     owner: root
     group: root
-    mode: 0600
+    mode: '0600'
   tags:
     - rt
   notify:
@@ -63,18 +65,18 @@
 - import_tasks: postgres.yml
 
 - name: Have RT packages installed
-  apt: 
+  apt:
     name:
       - request-tracker4
       - rt4-fcgi
       - rt4-db-postgresql
     state: present
-    install_recommends: no
+    install_recommends: false
   tags:
     - rt
 
 - name: Have nginx packages installed
-  apt: 
+  apt:
     name: nginx
     state: present
   when: rt_enable_nginx|default(True)
@@ -118,15 +120,16 @@
     dest: /etc/default/rt4-fcgi
     owner: root
     group: root
-    mode: 0644
+    mode: '0644'
   tags:
     - rt
 
 - name: Have DB for RT initialized
+  # yamllint disable-line rule:line-length
   shell: "rt-setup-database --action init --skip-create && touch /etc/request-tracker4/.db_initialized"
   args:
     creates: /etc/request-tracker4/.db_initialized
-  become: yes
+  become: true
   become_user: www-data
   tags:
     - rt
@@ -144,7 +147,7 @@
   service:
     name: "{{ item }}"
     state: started
-    enabled: yes
+    enabled: true
   with_items:
     - rt4-fcgi
     - request-tracker4
@@ -155,7 +158,7 @@
   service:
     name: nginx
     state: started
-    enabled: yes
+    enabled: true
   when: rt_enable_nginx|default(True)
   tags:
     - rt
diff --git a/request-tracker/tasks/postgres.yml b/request-tracker/tasks/postgres.yml
index f4f559fc5f43c801c3fd7f0a1fb77a9ba7b53a1d..bef8fd7ea263411577ed7f8b54894da32f04a789 100644
--- a/request-tracker/tasks/postgres.yml
+++ b/request-tracker/tasks/postgres.yml
@@ -1,6 +1,8 @@
+---
+
 - name: Ensure the Postgres user exists
   postgresql_user: name=www-data state=present
-  become: yes
+  become: true
   become_user: postgres
   tags:
     - postgresql
@@ -8,7 +10,7 @@
 
 - name: Ensure the Postgres DB exists
   postgresql_db: name=rtdb owner=www-data state=present
-  become: yes
+  become: true
   become_user: postgres
   tags:
     - postgresql
@@ -21,14 +23,17 @@
     state: present
     type: database
     roles: www-data
-  become: yes
+  become: true
   become_user: postgres
   tags:
     - postgresql
     - rt
 
 - name: Ensure Postgres is started
-  service: name=postgresql state=started enabled=yes
+  service:
+    name: postgresql
+    state: started
+    enabled: true
   tags:
     - postgresql
     - rt