diff --git a/_config.yml b/_config.yml
index a377fa6f..afb4363e 100644
--- a/_config.yml
+++ b/_config.yml
@@ -47,7 +47,7 @@ pygments:    true
 markdown:    kramdown
 
 # https://github.com/mojombo/jekyll/wiki/Permalinks
-permalink:   /:categories/:title
+permalink:   /:categories/:title/
 
 kramdown:
   auto_ids: true