diff --git a/jupyter_vscode_proxy/__init__.py b/jupyter_vscode_proxy/__init__.py
index db40803..e920567 100644
--- a/jupyter_vscode_proxy/__init__.py
+++ b/jupyter_vscode_proxy/__init__.py
@@ -14,7 +14,7 @@ def _get_vscode_cmd(port):
             executable,
             '--no-auth',
             '--allow-http',
-            '--port ' + str(port),
+            '--port=' + str(port),
             #working_dir
         ]
         print('Running', ' '.join(cmd),  file=open("/tmp/log.log", "w"))