diff --git a/roles/mastodon-app/tasks/main.yml b/roles/mastodon-app/tasks/main.yml
index 48e5069..947c29d 100644
--- a/roles/mastodon-app/tasks/main.yml
+++ b/roles/mastodon-app/tasks/main.yml
@@ -11,7 +11,7 @@
   become: true
   become_user: mastodon
 - name: Install bundler
-  shell: cd /home/mastodon/live && gem install bundler
+  shell: cd /home/mastodon/live && gem install bundler && gem install bundler -v 1.16.6
   args:
     executable: /bin/bash
   environment: