diff --git a/_pages/ohbm2024.md b/_pages/ohbm2024.md
index 67491ebc03b..571f407e951 100644
--- a/_pages/ohbm2024.md
+++ b/_pages/ohbm2024.md
@@ -16,7 +16,7 @@ The symposium will take place on Sunday, Jun 23, 9:00am - 5:30pm (KST, UTC+9).
 
 9.10-9.40 - Matthew Glasser: __MR acquisition and pre-processing to optimise surface analyses__. [Download](https://emckclac-my.sharepoint.com/:p:/g/personal/k1644933_kcl_ac_uk/EUNGl7S0YBNEjUMhAMICo-UBJSVswq-NZ56xM_kzNP-URA?e=pUfPWY)
 
-9.40-10.20 - Logan Williams: __Surface registration and cortical parcellation.__
+9.40-10.20 - Logan Williams: __Surface registration and cortical parcellation.__[Download](https://docs.google.com/presentation/d/1voXMDy5VFjaHAYcsGwboBNbBawhns1bU/edit?usp=sharing&ouid=102123682150311517228&rtpof=true&sd=true)
 
 10.20-11.00 - Lilla Zöllei: __Cortical surfaces for neurodevelopment using infant FreeSurfer.__ [Download](https://emckclac-my.sharepoint.com/:p:/g/personal/k1644933_kcl_ac_uk/EYKU-OTaFoBOjKAGrerS1AcBvhYHXdJEznylPmuJFW2s0Q?e=axWS5j)