diff --git a/README.md b/README.md
index 4be9fa7..98e7e76 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ src: https://github.com/londonappbrewery/Flutter-Course-Resources
 * [Lecture#1](https://docs.google.com/presentation/d/17E1iOGQK41FX6WrAGvOU_KVW59a7Gh5LynuTxCdfguQ/edit)
 * [Lecture#2](https://docs.google.com/presentation/d/1JLm-Z6sJ9H3KoKOzsvYanZx-8c1oU3dJDtDMIqi6M34/edit)
 * [Lecture#3](https://docs.google.com/presentation/d/1RetKleGwCzp-n8G1TzL816RujmVmqKjHqKdDj4lWUXs/edit)
+* [Lecture#4](https://docs.google.com/presentation/d/1jXh-gusNqylrMaWw8QN2XnMiBdD6ebCuiVpv3eDPbho/edit)
 
 
 ### Introduction to Cross-Platform Development with Flutter and Dart