diff --git a/app/admin/event.rb b/app/admin/event.rb
index d0387262..d3d3f42c 100644
--- a/app/admin/event.rb
+++ b/app/admin/event.rb
@@ -9,7 +9,7 @@ ActiveAdmin.register Event do
 
   config.sort_order = 'start_time_desc'
 
-  filter :region
+  filter :region, multiple: true
   filter :start_time
   filter :base_tags