diff --git a/.github/workflows/lint-workflow.yml b/.github/workflows/lint-workflow.yml
index b08b1ca..84f6de1 100644
--- a/.github/workflows/lint-workflow.yml
+++ b/.github/workflows/lint-workflow.yml
@@ -38,7 +38,7 @@ jobs:
     if: github.repository == 'azimuth-cloud/azimuth-sample-appliance'
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           # super-linter needs the full git history to get the
           # list of files that changed across commits
@@ -46,7 +46,7 @@ jobs:
           submodules: true
 
       - name: Run ansible-lint
-        uses: ansible/ansible-lint@v25.4.0
+        uses: ansible/ansible-lint@e98f9b38769d45cbe3c55a23b2eb25631babe7c4 # v25.4.0
 
       - name: Load super-linter configuration
         # Use grep inverse matching to exclude eventual comments in the .env file
@@ -58,7 +58,7 @@ jobs:
         run: grep -v '^#' super-linter.env >> "$GITHUB_ENV"
 
       - name: Run super-linter
-        uses: super-linter/super-linter@v7.3.0
+        uses: super-linter/super-linter@4e8a7c2bf106c4c766c816b35ec612638dc9b6b2 # v7.3.0
         if: always()
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/roles/backend/tasks/main.yml b/roles/backend/tasks/main.yml
index dc19a9e..cbb2653 100644
--- a/roles/backend/tasks/main.yml
+++ b/roles/backend/tasks/main.yml
@@ -10,17 +10,17 @@
     src: index.html.j2
     dest: /opt/sample-appliance/html/index.html
     mode: '0644'
-  register: html_index
+  register: backend_html_index
 
 - name: Install Nginx site config
   ansible.builtin.template:
     src: nginx.conf.j2
     dest: /etc/nginx/conf.d/sample-appliance.conf
     mode: '0644'
-  register: nginx_conf
+  register: backend_nginx_conf
 
 - name: Restart Nginx if required
   ansible.builtin.service:
     name: nginx
     state: restarted
-  when: html_index is changed or nginx_conf is changed
+  when: backend_html_index is changed or backend_nginx_conf is changed
diff --git a/roles/nginx_install/tasks/main.yml b/roles/nginx_install/tasks/main.yml
index 7d14e58..e9a199b 100644
--- a/roles/nginx_install/tasks/main.yml
+++ b/roles/nginx_install/tasks/main.yml
@@ -7,13 +7,13 @@
   ansible.builtin.package:
     name: nginx
     state: latest
-  register: nginx_package
+  register: nginx_install_nginx_package
 
 - name: Remove default site
   ansible.builtin.file:
     path: /etc/nginx/sites-enabled/default
     state: absent
-  register: nginx_default_site
+  register: nginx_install_nginx_default_site
 
 - name: Start and enable Nginx service
   ansible.builtin.service:
@@ -21,7 +21,8 @@
     state: >-
       {{-
         'restarted'
-        if nginx_package is changed or nginx_default_site is changed
+        if nginx_install_nginx_package is changed
+        or nginx_install_nginx_default_site is changed
         else 'started'
       }}
     enabled: true