diff --git a/_config.yml b/_config.yml
index 6949710..ee3b648 100644
--- a/_config.yml
+++ b/_config.yml
@@ -31,6 +31,7 @@ gems:
     - jekyll-coffeescript
     - jekyll-paginate
     - jekyll-redirect-from
+    - jekyll-mentions
 
 kramdown:
     input: GFM