diff --git a/crystal_toolkit/core/jupyter.py b/crystal_toolkit/core/jupyter.py
index a58a96e8..61443854 100644
--- a/crystal_toolkit/core/jupyter.py
+++ b/crystal_toolkit/core/jupyter.py
@@ -39,9 +39,7 @@ def _find_available_port():
         import socketserver
 
         with socketserver.TCPServer(("localhost", 0), None) as s:
-            free_port = s.server_address[1]
-
-        return free_port
+            return s.server_address[1]
 
     # check docs about callback exception output
     # check docs about proxy settings