diff --git a/systems/kat.md b/systems/kat.md
index 3330f92296bbd908f3d9124185ba5769fe779260..ca164f6ec1936339ffd3cc9d60170ede1883dd7c 100644
--- a/systems/kat.md
+++ b/systems/kat.md
@@ -7,8 +7,8 @@ teaser: An Annotation Tool for STEM Documents
 start_date: 2013-06
 
 people:
-	- mkohlhase
-	- twiesing
+    - mkohlhase
+    - twiesing
 
 repository: https://github.com/KWARC/KAT 
 ---