diff --git a/gitlab/docker-compose.yml b/gitlab/docker-compose.yml
index a457540..ebf9ae0 100644
--- a/gitlab/docker-compose.yml
+++ b/gitlab/docker-compose.yml
@@ -33,7 +33,33 @@ services:
             'block_auto_created_users' => false
           }
         }
-
+        gitlab_rails['omniauth_enabled'] = true
+        gitlab_rails['omniauth_allow_single_sign_on'] = ['saml']
+        gitlab_rails['omniauth_sync_email_from_provider'] = 'saml'
+        gitlab_rails['omniauth_sync_profile_from_provider'] = ['saml']
+        gitlab_rails['omniauth_sync_profile_attributes'] = ['email']
+        gitlab_rails['omniauth_auto_sign_in_with_provider'] = 'saml'
+        gitlab_rails['omniauth_block_auto_created_users'] = false
+        gitlab_rails['omniauth_auto_link_saml_user'] = true
+        gitlab_rails['omniauth_providers'] = [
+          {
+            name: 'saml',
+            args: {
+              assertion_consumer_service_url: 'https://gitlab.sectorq.eu/users/auth/saml/callback',
+              # Shown when navigating to certificates in authentik
+              idp_cert_fingerprint: '4E:1E:CD:67:4A:67:5A:E9:6A:D0:3C:E6:DD:7A:F2:44:2E:76:00:6A',
+              idp_sso_target_url: 'https://auth.sectorq.eu/application/saml/<authentik application slug>/sso/binding/redirect/',
+              issuer: 'https://gitlab.sectorq.eu',
+              name_identifier_format: 'urn:oasis:names:tc:SAML:2.0:nameid-format:persistent',
+              attribute_statements: {
+                email: ['http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress'],
+                first_name: ['http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name'],
+                nickname: ['http://schemas.goauthentik.io/2021/02/saml/username']
+              }
+            },
+            label: 'authentik'
+          }
+        ]
     hostname: 'gitlab.sectorq.eu'
     ports:
       - '8780:80'