diff --git a/lightshowai/xas_ui.py b/lightshowai/xas_ui.py
index fbe543a..8981a3c 100644
--- a/lightshowai/xas_ui.py
+++ b/lightshowai/xas_ui.py
@@ -1868,7 +1868,7 @@ def serve():
               "please set your materials project API key to "
               "this environment variable before running this app")
         exit()
-    app.run(debug=False, port=8443, host='0.0.0.0')
+    app.run(debug=False, port=8443, host='127.0.0.1')
 
 if __name__ == "__main__":
     serve()
\ No newline at end of file