diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7d04e5d..85a1b2d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,4 +5,4 @@ matplotlib
 pentapy
 pytest
 pytest-cov
-pytest-xdist
\ No newline at end of file
+pytest-xdist[psutil]
\ No newline at end of file