diff --git a/requirements.txt b/requirements.txt
index a8f96c7..e99a0fe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,3 +6,4 @@ pandas>=2.1.0
 shapely>=2.0.0
 pyproj>=3.6.0
 rtree>=1.1.0
+psutil>=5.9.0