diff --git a/_data/materials.yaml b/_data/materials.yaml
index 97ebb5b..5df26cf 100644
--- a/_data/materials.yaml
+++ b/_data/materials.yaml
@@ -29,7 +29,7 @@
   date: 2/25/2025
   name: Services
   labdue: Sat. 3/1
-  hidelink: true
+  hidelink: false
   slides: https://docs.google.com/presentation/d/1wzExKq-Yp73b6KJh-hrp2HhumV-q2-i9XG_f5WPOahY/edit?usp=sharing
   video: https://drive.google.com/file/d/1qrOXlC-HgkgOJU83DU2ZO4SZVJSamMUF/view?usp=sharing
 
diff --git a/labs/4.md b/labs/4.md
index a2ef82d..78cd579 100644
--- a/labs/4.md
+++ b/labs/4.md
@@ -1,7 +1,7 @@
 ---
 title: Lab 4 - Processes and Services
 layout: lab
-facilitator: Oliver Ni
+facilitator: Joe Wang 
 nav_exclude: true
 ---