diff --git a/roles/mastodon-nginx/tasks/install.yml b/roles/mastodon-nginx/tasks/install.yml
index b05404a..c785c76 100644
--- a/roles/mastodon-nginx/tasks/install.yml
+++ b/roles/mastodon-nginx/tasks/install.yml
@@ -5,8 +5,8 @@
 - name: Stop nginx for now
   service: name=nginx state=stopped
 - name: Generate standalone Let's Encrypt TLS certificate for Mastodon instance
-  shell: letsencrypt certonly -n --agree-tos --standalone -d {{ LOCAL_DOMAIN }} --email "webmaster@{{ LOCAL_DOMAIN }}"
+  shell: letsencrypt certonly -n --agree-tos --standalone -d {{ LOCAL_DOMAIN }} -m "webmaster@{{ LOCAL_DOMAIN }}"
 - name: Restart nginx
   service: name=nginx state=started
 - name: Generate webroot Let's Encrypt TLS certificate for Mastodon instance
-  shell: letsencrypt certonly -n --webroot -d {{ LOCAL_DOMAIN }} -w /home/mastodon/live/public/ --email "webmaster@{{ LOCAL_DOMAIN }}"
+  shell: letsencrypt certonly -n --webroot -d {{ LOCAL_DOMAIN }} -w /home/mastodon/live/public/ -m "webmaster@{{ LOCAL_DOMAIN }}"