diff --git a/README.md b/README.md
index 13fa7469d16794edcd3816fd18b3fdf290e25494..329c7fd4247ed927c8ee0867c0bf64ae811ec4d4 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,8 @@ Note that slides can be found **underneath each lecture video** on switch tube l
 | 1    | Wed | 22.09.2021 | 08:15 | INM202 | Lecture 1            | [Intro to CLP](https://tube.switch.ch/videos/3351ec99), [Formal languages](https://tube.switch.ch/videos/6df3a6ba), [Live Recording](https://tube.switch.ch/videos/N0KUZHSEnt) |
 |      | Thu | 23.09.2021 | 08:15 | INF119 | Lecture 2            | [Operations on Languages](https://tube.switch.ch/videos/1846c6f2), [Regular Expressions and Lexer Idea](https://tube.switch.ch/videos/c903b9d5), [Live Recording 1](https://tube.switch.ch/videos/cdQxQvZcV8), [Live Recording 2](https://tube.switch.ch/videos/26pmlTMe8j) |
 | 2    | Mon | 27.09.2021 | 13:15 | CE1100 | Lecture 3            | [First Symbols. Constructing a Lexer](https://tube.switch.ch/videos/fc864ce0), [Live Recording 1](https://tube.switch.ch/videos/WjS9tOAVex) [From Regular Expressions to Automata](https://tube.switch.ch/videos/a15b1c5f), [Live Recording 2](https://tube.switch.ch/videos/sBurwXgGlO) |
-|      | Wed | 29.09.2011  | 08:15 | INM202 | Labs 1               | [Labs setup](https://gitlab.epfl.ch/lara/cs320/-/blob/main/labs/labs_setup.md), [Amy Interpreter](https://gitlab.epfl.ch/lara/cs320/-/blob/main/labs/labs_01.md)         |
+|      | Wed | 29.09.2011  | 08:15 | INM202 | Labs 1              | [Labs setup](https://gitlab.epfl.ch/lara/cs320/-/blob/main/labs/labs_setup.md), [Amy Interpreter](https://gitlab.epfl.ch/lara/cs320/-/blob/main/labs/labs_01.md)         |
 |      | Thu | 30.09.2011  | 08:15 | INF119 | Labs 1     |  |
 | 3    | Mon | 04.10.2021 | 13:15 | CE1100 | Lecture 4            | [Introduction to Grammars](https://tube.switch.ch/videos/ef9ae6c1), [Syntax Trees](https://tube.switch.ch/videos/9314ac16), [LL(1) Parsing](https://tube.switch.ch/videos/38dd46b4) |
-|     | Wednesday | 06.10.2021 | 8:15 | INM202 | Labs 2            | [Lexer](https://gitlab.epfl.ch/lara/cs320/-/blob/main/labs/labs_02.md) |
+|     | Wednesday | 06.10.2021 | 8:15 | INM202 | Labs 2           | [Lexer](https://gitlab.epfl.ch/lara/cs320/-/blob/main/labs/labs_02.md) |
+| 4    | Mon | 11.10.2021 | 13:15 | CE1100 | Lecture 5            | [CYK Algorithm for Parsing General Context-Free Grammars](https://tube.switch.ch/videos/672add06), [Chomsky Normal Form Transformation](https://tube.switch.ch/videos/2d3503f4) |