diff --git a/config/database.yml b/config/database.yml
index f4f796966..22dc767bb 100644
--- a/config/database.yml
+++ b/config/database.yml
@@ -21,5 +21,6 @@ production:
   database: e621
   password: <%= ENV.fetch("DB_PASSWORD") %>
   host: <%= ENV.fetch("DB_HOST") %>
+  port: <%= ENV.fetch("DB_PORT") %>
   pool: <%= Sidekiq.server? ? ENV.fetch("DB_WORKER_POOL_SIZE") : ENV.fetch("DB_POOL_SIZE") %>
 <% end %>