diff --git a/phylogenetic/defaults/config_dengue.yaml b/phylogenetic/defaults/config_dengue.yaml
index 7fc1b44..320bded 100644
--- a/phylogenetic/defaults/config_dengue.yaml
+++ b/phylogenetic/defaults/config_dengue.yaml
@@ -39,7 +39,7 @@ clades:
     denv4: 'defaults/clades_genotypes.tsv'
 
 tip_frequencies:
-    min_date: "1970-01-01"
+    min_date: "1980-01-01"
     max_date: "6M"
     narrow_bandwidth: 0.2
     wide_bandwidth: 0.6