diff --git a/config/h5n1-cattle-outbreak.yaml b/config/h5n1-cattle-outbreak.yaml
index fc07d39..c7cef7f 100644
--- a/config/h5n1-cattle-outbreak.yaml
+++ b/config/h5n1-cattle-outbreak.yaml
@@ -76,7 +76,7 @@ refine:
   date_inference: marginal
 
   genome_clock_filter_iqd:
-    FALLBACK: 3
+    FALLBACK: 2
   clock_filter_iqd:
     FALLBACK: false