diff --git a/_data/sponsorship.yml b/_data/sponsorship.yml
index fe4aaaaa..1f2a55be 100644
--- a/_data/sponsorship.yml
+++ b/_data/sponsorship.yml
@@ -1185,7 +1185,7 @@ sponsors:
   - name: Institute for Systems Biology
     url: https://isbscience.org/
     logo:
-      horizontal: /img/sponsors/InstituteSystemsBiology/ISB_logo_dk.png
+      horizontal: /img/sponsors/InstituteSystemsBiology/ISB_logo_dk.webp
       square: 
     description: |-
       ISB serves as the ultimate environment where scientific collaboration stretches across disciplines and across academic and industrial organizations, where our researchers have the intellectual freedom to challenge the status quo, and where grand visions for breakthroughs in human health inspire a collective drive to achieve the seemingly impossible.