diff --git a/_toc.yml b/_toc.yml
index 018eba11..430b74c2 100644
--- a/_toc.yml
+++ b/_toc.yml
@@ -36,6 +36,10 @@ parts:
   - file: Open-Science-101/Module_5/readme
     sections:
     - file: Open-Science-101/Module_5/Lesson_1/readme.md
+    - file: Open-Science-101/Module_5/Lesson_2/readme.md
+    - file: Open-Science-101/Module_5/Lesson_3/readme.md
+    - file: Open-Science-101/Module_5/Lesson_4/readme.md
+    - file: Open-Science-101/Module_5/Lesson_5/readme.md
 - caption: About TOPS
   chapters:
   - file: About/About-Announcements