diff --git a/requirements.txt b/requirements.txt
index 3e93f4b4..3489d65a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ mappy==2.18
 toml==0.10.2
 tqdm==4.60.0
 numpy<=1.18.5
+scipy==1.6.2
 torch==1.8.0
 parasail==1.2
 seqdist==0.0.3