diff --git a/requirements.txt b/requirements.txt
index 81785f9..f2bef5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,5 @@ openpyxl==3.1.2
 pandas==2.2.1
 scipy==1.12.0
 sympy==1.12
-cifkit==0.22
\ No newline at end of file
+cifkit==0.22
+pyvista==0.43.9
\ No newline at end of file