diff --git a/config/packages/twig.yaml b/config/packages/twig.yaml
index ad2c769f..645bb7c7 100644
--- a/config/packages/twig.yaml
+++ b/config/packages/twig.yaml
@@ -4,6 +4,8 @@ twig:
         feature_three_forms: '%feature_three_forms%'
         platform:
             url: '%base_url%'
+        gitbook:
+            faq: https://faq.stop-punaises.gouv.fr/
 
 when@dev:
     twig:
diff --git a/templates/common/header-back.html.twig b/templates/common/header-back.html.twig
index e9e7e89f..a0f8dfa2 100644
--- a/templates/common/header-back.html.twig
+++ b/templates/common/header-back.html.twig
@@ -93,6 +93,13 @@
                             <a class="fr-nav__link" href="{{ path('app_entreprise_list') }}" target="_self" {% if app.request.get('_route') == 'app_entreprise_list' or app.request.get('_route') == 'app_entreprise_view' %}aria-current="page"{% endif %}>Les entreprises</a>
                         </li>
                     {% endif %}
+                    
+                    {% if gitbook is defined %}
+                        <li class="fr-nav__item">
+                            <a class="fr-nav__link" href="{{ gitbook.faq }}" target="_blank" rel="noopener"
+                                >Documentation</a>
+                        </li>
+                    {% endif %}
                 </ul>
             </nav>
         </div>