diff --git a/Koli_2017/images/BDL_ERD.pu b/Koli_2017/images/BDL_ERD.pu
index cda19e8..1c43762 100644
--- a/Koli_2017/images/BDL_ERD.pu
+++ b/Koli_2017/images/BDL_ERD.pu
@@ -9,6 +9,7 @@
     Monochrome true
     LineType ortho
     RankSep 40
+    ClassBorderThickness 0.7
 }
 
 entity Customer