diff --git a/server/requirements.txt b/server/requirements.txt
index 1f8a8669..239d6b6d 100644
--- a/server/requirements.txt
+++ b/server/requirements.txt
@@ -9,3 +9,4 @@ numpy==1.14.5
 pandas==0.23.1
 scanpy==1.3.2
 scipy==1.1.0
+scikit-learn==0.19.1
\ No newline at end of file