diff --git a/index.yml b/index.yml
index 3491558..7d36835 100644
--- a/index.yml
+++ b/index.yml
@@ -111,6 +111,8 @@
           url: week-1.html
         - lable: week 2
           url: week-2.html
+        - lable: week 3
+          url: week-3.html
     - lable: EPS20
       sidebar:
         - lable: index