diff --git a/_config.yml b/_config.yml
index ff42336a..4d98fe2b 100644
--- a/_config.yml
+++ b/_config.yml
@@ -23,6 +23,7 @@ pygments:    true
 markdown:    kramdown
 
 # https://github.com/mojombo/jekyll/wiki/Permalinks
+permalink:   /:categories/:title
 
 maruku:
   use_tex:    false