diff --git a/app/helpers/frontend_urls_helper.rb b/app/helpers/frontend_urls_helper.rb
index 281c8bcc3..67b117f06 100644
--- a/app/helpers/frontend_urls_helper.rb
+++ b/app/helpers/frontend_urls_helper.rb
@@ -2,6 +2,7 @@ module FrontendUrlsHelper
   def frontend_url(path, **query_params)
     url_params = query_params.blank? ? '' : "?#{query_params.to_query}"
     host = ENV.fetch('FRONTEND_URL_EXTERNAL', root_url)
+    host = "#{host}/" unless host.end_with?('/')
     "#{host}app/#{path}#{url_params}"
   end
 end