diff --git a/Labs/Lab4/lab4.md b/Labs/Lab4/lab4.md
index 97f6559c3f1c60581dcfb918d7af5b7c7112a25c..14d5f2eb4b2c166129ff5c06314f146cdee3d7d4 100644
--- a/Labs/Lab4/lab4.md
+++ b/Labs/Lab4/lab4.md
@@ -4,4 +4,9 @@
 
 2. Inside this folder, there is a notebook `debug/self/main.ipynb`. Open it and fix the bugs. 
 
-3. Create a [binary search tree](./bst-groups) for use in P2. 
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+3. Create a [binary search tree](./bst-groups) for use in P2. 
+
+
+# Screenshot Requirement
+1. A screenshot showing the successfully debugged `main.ipynb`` notebook.
+2. A screenshot of your binary search tree implementation.
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