diff --git a/matrix/synapse.yaml b/matrix/synapse.yaml
index 94bf1a4..aa2e9c3 100644
--- a/matrix/synapse.yaml
+++ b/matrix/synapse.yaml
@@ -16,6 +16,22 @@ data:
     enable_metrics: true
     report_stats: true
 
+    oidc_providers:
+      - idp_id: authentik
+        idp_name: "Authentik"
+        idp_brand: "authentik"
+        issuer: "https://auth.apps.undercloud.dev/application/o/matrix/"
+        client_id: "w9W4luRWCA8VGnzkrw278ppJVVEV2LE5XuPfjU5d"
+        client_secret: "n3sjaFXIZZzgUxS822AakkGdueTZNcEQAx92WQVjnZ714ZKuujAaPtx7ML7MPtSPT3qLmrIduSKICkSO05zrht7kttn2DxpIeFNRELpCNPK171xglqb9lGhGuRIVJV4J"
+        scopes: ["openid", "profile", "email"]
+        allow_existing_users: true
+        enable_registration: true
+        user_mapping_provider:
+          config:
+            localpart_template: "{{ user.preferred_username | lower }}"
+            display_name_template: "{{ user.name }}"
+            email_template: "{{ user.email }}"
+
     listeners:
       - port: 8008
         tls: false