diff --git a/flask-server/requirements.txt b/flask-server/requirements.txt
index 25be9efc..4d6433e9 100644
--- a/flask-server/requirements.txt
+++ b/flask-server/requirements.txt
@@ -37,7 +37,7 @@ SimpleITK>=2.4.0
 SQLAlchemy==2.0.37
 trimesh>=4.0.0
 typing_extensions>=4.15.0
-tzlocal==5.2
+tzlocal==5.4.4
 urllib3==2.2.3
 Werkzeug==3.0.3
 wheel==0.45.1