diff --git a/paper.md b/paper.md
index 4877007..c69d028 100644
--- a/paper.md
+++ b/paper.md
@@ -26,7 +26,7 @@ affiliations:
  - name: Fermilab, USA
    index: 2
  - name: California Institute of Technology, USA
-   index: 2
+   index: 3
 date: 2023
 bibliography: paper.bib
 ---