diff --git a/envs/python_packages.txt b/envs/python_packages.txt
index cdd887e..aaa9f4f 100644
--- a/envs/python_packages.txt
+++ b/envs/python_packages.txt
@@ -36,6 +36,7 @@ pillow
 ptpython
 pyarrow
 python-lsp-server
+qtl
 scikit-learn
 scipy
 seaborn