diff --git a/requirements.txt b/requirements.txt
index c4e8bd8db8e140c6c41be8c8fbe327381a132fe0..806bad8d993da1aff959e0ab5f4fbbfc7888c083 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 setuptools_scm
 numpy
+scipy
 spython
 thepipe
 particle