diff --git a/projects/index.html b/projects/index.html
index 5240ceb..af61a83 100644
--- a/projects/index.html
+++ b/projects/index.html
@@ -35,7 +35,7 @@ works_right:
 - title: Thunderbird Project
   link_to: thunderbird
   image: images/projects/tb_overview.png
-  categories: Usability Research, Style Guide
+  categories: Usability Study, Style Guide
 ---
 
 <div class="full new" style="background-color: #3399d4;">