diff --git a/requirements.txt b/requirements.txt
index eb4e335..9b8cb4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ pandas>=1.0.0
 tqdm>=4.0.0
 scikit-learn>=0.18
 torchvision>=0.7.0
+scikit-survival>=0.15.0