diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..3042de1
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,31 @@
+---
+kind: pipeline
+type: docker
+name: pull_request
+image_pull_secrets:
+  - dockerconfigjson
+
+steps:
+  - name: lint yaml
+    image: registry.fedy95.com/baseimage-yamllint:latest
+    commands:
+      - yamllint -c /yamllint/relaxed.yaml group_vars/all.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/common/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/docker/defaults/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/docker/handlers/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/docker/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/docker/vars/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/firefox/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/ide_goland/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/ide_goland/vars/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/ide_phpstorm/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/ide_phpstorm/vars/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/krdc/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/materia-kde/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/telegram/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml roles/typeface/tasks/main.yml
+      - yamllint -c /yamllint/relaxed.yaml .drone.yml
+      - yamllint -c /yamllint/relaxed.yaml ansible-desktop.yml
+    when:
+      event: pull_request
+...
diff --git a/Makefile b/Makefile
index 5353fca..a9ba300 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,33 @@
 MAKEFLAGS += --silent
-
 .PHONY: *
 
+REGISTRY=registry.fedy95.com
+YAMLLINT_TAG=baseimage-yamllint:latest
+
+lint: lint-yaml
+
+LINT-YAML-CMD=docker run --rm -it -v $(PWD):/data ${REGISTRY}/${YAMLLINT_TAG}
+lint-yaml:
+	docker pull ${REGISTRY}/${YAMLLINT_TAG}
+	$(LINT-YAML-CMD) group_vars/all.yml
+	$(LINT-YAML-CMD) roles/common/tasks/main.yml
+	$(LINT-YAML-CMD) roles/docker/defaults/main.yml
+	$(LINT-YAML-CMD) roles/docker/handlers/main.yml
+	$(LINT-YAML-CMD) roles/docker/tasks/main.yml
+	$(LINT-YAML-CMD) roles/docker/vars/main.yml
+	$(LINT-YAML-CMD) roles/firefox/tasks/main.yml
+	$(LINT-YAML-CMD) roles/ide_goland/tasks/main.yml
+	$(LINT-YAML-CMD) roles/ide_goland/vars/main.yml
+	$(LINT-YAML-CMD) roles/ide_phpstorm/tasks/main.yml
+	$(LINT-YAML-CMD) roles/ide_phpstorm/vars/main.yml
+	$(LINT-YAML-CMD) roles/krdc/tasks/main.yml
+	$(LINT-YAML-CMD) roles/materia-kde/tasks/main.yml
+	$(LINT-YAML-CMD) roles/telegram/tasks/main.yml
+	$(LINT-YAML-CMD) roles/typeface/tasks/main.yml
+	$(LINT-YAML-CMD) .drone.yml
+	$(LINT-YAML-CMD) ansible-desktop.yml
+
 run:
 	ansible-playbook ansible-desktop.yml --ask-become-pass
 
-.DEFAULT_GOAL := run
+.DEFAULT_GOAL := lint
diff --git a/ansible-desktop.yml b/ansible-desktop.yml
index a9f7476..e70b58d 100644
--- a/ansible-desktop.yml
+++ b/ansible-desktop.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Base playbook
   hosts: localhost
   roles:
@@ -12,3 +11,4 @@
 #     - { role: materia-kde, become: true } # https://github.com/PapirusDevelopmentTeam/materia-kde
      - { role: telegram, become: true }
      - { role: typeface, become: true }
+...
diff --git a/group_vars/all.yml b/group_vars/all.yml
index 9e07aa7..dcd29cb 100644
--- a/group_vars/all.yml
+++ b/group_vars/all.yml
@@ -1,7 +1,7 @@
 ---
-
 # http://docs.ansible.com/ansible/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable
 aptcachetime: 3600
 locale: "en_US.UTF-8"
 timezone: "Europe/Moscow"
 lsb_release: 'focal'
+...
diff --git a/roles/common/tasks/main.yml b/roles/common/tasks/main.yml
index 036c56b..3d2bfbe 100644
--- a/roles/common/tasks/main.yml
+++ b/roles/common/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Ensure the system can use the HTTPS transport for APT
   stat: path=/usr/lib/apt/methods/https
   register: apt_https_transport
@@ -54,3 +53,4 @@
     state: directory
   become: yes
   become_user: fedy95
+...
diff --git a/roles/docker/defaults/main.yml b/roles/docker/defaults/main.yml
index 6150035..7f6eb16 100644
--- a/roles/docker/defaults/main.yml
+++ b/roles/docker/defaults/main.yml
@@ -1,5 +1,5 @@
 ---
-
 docker:
   start: false
   service_enabled: no
+...
diff --git a/roles/docker/handlers/main.yml b/roles/docker/handlers/main.yml
index e070c2c..c68a8b9 100644
--- a/roles/docker/handlers/main.yml
+++ b/roles/docker/handlers/main.yml
@@ -1,4 +1,4 @@
 ---
-
 - name: Restart Docker
   service: name=docker state=restarted
+...
diff --git a/roles/docker/tasks/main.yml b/roles/docker/tasks/main.yml
index 41d11ce..3b12e86 100644
--- a/roles/docker/tasks/main.yml
+++ b/roles/docker/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Test if folder exist
   stat:
     path: "{{ docker_compose_bin }}"
@@ -38,7 +37,7 @@
 #- name: Add deb repository
 #  apt_repository:
 #    repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu groovy stable
-#    update_cache: yes 
+#    update_cache: yes
 #    state: present
 #  when: docker_compose_bin_exist.stat.exists == False
 
@@ -74,3 +73,4 @@
 - name: Upgrade installed packages
   apt: upgrade=yes
   when: docker_compose_bin_exist.stat.exists == False
+...
diff --git a/roles/docker/vars/main.yml b/roles/docker/vars/main.yml
index d1dc7dc..378227c 100644
--- a/roles/docker/vars/main.yml
+++ b/roles/docker/vars/main.yml
@@ -1,4 +1,4 @@
 ---
-
 docker_compose_bin: "/usr/local/bin/docker-compose"
 docker_compose_version: "1.27.4"
+...
diff --git a/roles/firefox/tasks/main.yml b/roles/firefox/tasks/main.yml
index b1ac93b..2b4b853 100644
--- a/roles/firefox/tasks/main.yml
+++ b/roles/firefox/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Install Firefox
   apt:
     pkg: firefox
@@ -9,3 +8,4 @@
 
 - name: Upgrade installed packages
   apt: upgrade=yes
+...
diff --git a/roles/ide_goland/tasks/main.yml b/roles/ide_goland/tasks/main.yml
index c81b811..b1650dc 100644
--- a/roles/ide_goland/tasks/main.yml
+++ b/roles/ide_goland/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Check opt artifacts exist
   stat:
     path: "/opt/goland-{{ goland_version }}"
@@ -44,3 +43,4 @@
 - name: Init start (Create Desktop Entry)
   command: sh {{ goland_bin }}
   when: goland_bin_flag.stat.exists == False
+...
diff --git a/roles/ide_goland/vars/main.yml b/roles/ide_goland/vars/main.yml
index 2e069d2..f8b1894 100644
--- a/roles/ide_goland/vars/main.yml
+++ b/roles/ide_goland/vars/main.yml
@@ -1,4 +1,4 @@
 ---
-
 goland_bin: "/usr/local/bin/goland"
 goland_version: "2020.3.3"
+...
diff --git a/roles/ide_phpstorm/tasks/main.yml b/roles/ide_phpstorm/tasks/main.yml
index 8b3732b..199676f 100644
--- a/roles/ide_phpstorm/tasks/main.yml
+++ b/roles/ide_phpstorm/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Check opt artifacts exist
   stat:
     path: "/opt/phpstorm-{{ phpstorm_version }}"
@@ -44,3 +43,4 @@
 - name: Init start (Create Desktop Entry)
   command: sh {{ phpstorm_bin }}
   when: phpstorm_bin_flag.stat.exists == False
+...
diff --git a/roles/ide_phpstorm/vars/main.yml b/roles/ide_phpstorm/vars/main.yml
index 06144da..1bb05f5 100644
--- a/roles/ide_phpstorm/vars/main.yml
+++ b/roles/ide_phpstorm/vars/main.yml
@@ -1,4 +1,4 @@
 ---
-
 phpstorm_bin: "/usr/local/bin/phpstorm"
 phpstorm_version: "2020.3.2"
+...
diff --git a/roles/krdc/tasks/main.yml b/roles/krdc/tasks/main.yml
index 530dbb6..973dead 100644
--- a/roles/krdc/tasks/main.yml
+++ b/roles/krdc/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Install KRDC
   apt:
     pkg: krdc
@@ -9,3 +8,4 @@
 
 - name: Upgrade installed packages
   apt: upgrade=yes
+...
diff --git a/roles/materia-kde/tasks/main.yml b/roles/materia-kde/tasks/main.yml
index 1ed14a2..b814611 100644
--- a/roles/materia-kde/tasks/main.yml
+++ b/roles/materia-kde/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Update apt cache
   apt:
     update_cache: yes
@@ -27,3 +26,4 @@
   command: "lookandfeeltool -a com.github.varlesh.materia-dark"
   become: true
   become_user: "{{ ansible_env.USER }}"
+...
diff --git a/roles/telegram/tasks/main.yml b/roles/telegram/tasks/main.yml
index 93f16a8..ff95f22 100644
--- a/roles/telegram/tasks/main.yml
+++ b/roles/telegram/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Install Telegram
   apt:
     pkg: telegram-desktop
@@ -9,3 +8,4 @@
 
 - name: Upgrade installed packages
   apt: upgrade=yes
+...
diff --git a/roles/typeface/tasks/main.yml b/roles/typeface/tasks/main.yml
index fb3a7b3..930da7a 100644
--- a/roles/typeface/tasks/main.yml
+++ b/roles/typeface/tasks/main.yml
@@ -1,5 +1,4 @@
 ---
-
 - name: Download typeface
   get_url:
     url: https://raw.githubusercontent.com/JetBrains/JetBrainsMono/master/install_manual.sh
@@ -15,3 +14,4 @@
 
 - name: Remove script typeface
   shell: rm -r /opt/install_manual.sh
+...