diff --git a/roles/docker/defaults/main.yml b/roles/docker/defaults/main.yml
index 9bf8bef..804536a 100644
--- a/roles/docker/defaults/main.yml
+++ b/roles/docker/defaults/main.yml
@@ -18,3 +18,6 @@ fider:
 
 matrix:
   domain: "matrix.{{ base_domain }}"
+
+riot:
+  domain: "riot.{{ base_domain }}"
diff --git a/roles/docker/tasks/services/matrix_riot.yml b/roles/docker/tasks/services/matrix_riot.yml
index d8845ae..8adaf83 100644
--- a/roles/docker/tasks/services/matrix_riot.yml
+++ b/roles/docker/tasks/services/matrix_riot.yml
@@ -57,4 +57,8 @@
     networks:
       - name: matrix
       - name: external_services
-    
+    env:
+      VIRTUAL_HOST: "{{ riot.domain }}"
+      LETSENCRYPT_HOST: "{{ riot.domain }}"
+      LETSENCRYPT_EMAIL: "{{ letsencrypt_email }}"
+    
\ No newline at end of file