diff --git a/requirements.txt b/requirements.txt
index 999af65..6a04190 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,7 @@ numpy
 numpy_financial==1.0.0
 openpyxl==3.1.1
 pandas==2.2.3
+psutil
 plotly==5.17.0
 pvlib==0.9.4
 python_docx==0.8.11