diff --git a/app/views/stats/index.haml b/app/views/stats/index.haml
index 49fbd023..88e86aa3 100644
--- a/app/views/stats/index.haml
+++ b/app/views/stats/index.haml
@@ -27,6 +27,8 @@
       %p.lead= t('.urls.description')
       %form{ method: 'get', action: '#custom-urls' }
         %input{ type: 'hidden', name: 'interval', value: @interval }
+        %input{ type: 'hidden', name: 'period_start', value: params[:period_start] }
+        %input{ type: 'hidden', name: 'period_end', value: params[:period_end] }
         .form-group
           %label{ for: 'urls' }= t('.urls.label')
           %textarea#urls.form-control{ name: 'urls', autocomplete: 'on', required: true, rows: @normalized_urls.size + 1, aria_describedby: 'help-urls' }= @normalized_urls.join("\n")