diff --git a/requirements.txt b/requirements.txt
index 9a6472a..552eba2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 --index-url https://download.pytorch.org/whl/cu117
-biopython==1.83
+biopython<=1.81
 pandas==1.5.1
 torch==1.13.1+cu117
 transformers==4.36.2