diff --git a/README.md b/README.md
index 4d523fa..86034c0 100644
--- a/README.md
+++ b/README.md
@@ -17,8 +17,8 @@ The following is the draft timetable:
 | No | Date         | Subject                                            | Lab                            |
 |----|--------------|----------------------------------------------------|--------------------------------|
 | 2  | 27 Jan 2025  | Ciphers and Fundamentals [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit01_cipher_fundamentals)]                      | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit01_cipher_fundamentals/lab)] [[Demo](https://www.youtube.com/watch?v=v6H7lHblKes)]         |
-| 3  | 3 Feb 2025   | Symmetric Key [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit02_symmetric)]                                 | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit02_symmetric/lab)]         |
-| 4  | 10 Feb 2025  | Hashing and MAC [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit03_hashing)]                               | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit03_hashing/lab) [Vincent Rijmen](https://www.youtube.com/watch?v=u8kakBA7mkc)       |
+| 3  | 3 Feb 2025   | Symmetric Key [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit02_symmetric)]                                 | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit02_symmetric/lab)]  [Vincent Rijmen](https://www.youtube.com/watch?v=u8kakBA7mkc)         |
+| 4  | 10 Feb 2025  | Hashing and MAC [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit03_hashing)]                               | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit03_hashing/lab)       |
 | 5  | 17 Feb 2025  | Asymmetric (Public) Key [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit04_public_key)]                       | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit04_public_key/lab)]                     |
 | 6  | 24 Feb 2025  | Key Exchange   [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit05_key_exchange)]                                | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit05_key_exchange/lab) Whitfield Diffie]                |
 | 7 | 3 Mar 2025  | Reading Week (Revision lecture)   | Mini-project  [[Here](https://github.com/billbuchanan/appliedcrypto/tree/main/unit06a_mini_project)] /Coursework |