diff --git a/Instructions/Labs/LAB_04-Implement_Virtual_Networking.md b/Instructions/Labs/LAB_04-Implement_Virtual_Networking.md
index 939530e0..2782fd30 100644
--- a/Instructions/Labs/LAB_04-Implement_Virtual_Networking.md
+++ b/Instructions/Labs/LAB_04-Implement_Virtual_Networking.md
@@ -23,6 +23,8 @@ In this lab, you will:
 + Task 5: Configure Azure DNS for internal name resolution
 + Task 6: Configure Azure DNS for external name resolution
 
+## Estimated timing: 40 minutes
+
 ## Instructions
 
 ### Exercise 1