diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 808664b..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-Bio==1.5.6
diff --git a/setup.cfg b/setup.cfg
index ad1f310..50b6deb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,7 +5,7 @@ version = 0.0.1
 [options]
 packages = splitmsa
 install_requires =
-    Bio ==1.81; python_version == "3.9"
+    biopython ==1.81; python_version == "3.9"
 
 [options.entry_points]
 console_scripts =