diff --git a/flask-server/requirements.txt b/flask-server/requirements.txt
index a46d8762..3d32f1ec 100644
--- a/flask-server/requirements.txt
+++ b/flask-server/requirements.txt
@@ -36,7 +36,7 @@ reportlab==4.4.1
 scikit-image>=0.26.0
 scipy>=1.13.0
 setuptools==84.0.0
-SimpleITK>=2.4.0
+SimpleITK>=2.5.6
 SQLAlchemy==2.1.1
 trimesh>=5.1.0
 typing_extensions>=4.15.0