diff --git a/jupyter-openbis-extension/server.py b/jupyter-openbis-extension/server.py
index df56bbccab95445f01c1d6440d663e23d49fe93b..97d4909c5b85e9b1b1b5358257a6e933b0599a0b 100644
--- a/jupyter-openbis-extension/server.py
+++ b/jupyter-openbis-extension/server.py
@@ -108,7 +108,7 @@ def load_jupyter_server_extension(nb_server_app):
         [(  
             url_path_join(
                 base_url,
-                '/openbis/sample/(?P<connection_name>.*)?/(?P<permId>.*)'
+                '/openbis/sample/(?P<connection_name>.*)?/(?P<identifier>.*)'
             ), 
             SampleHandler
         )]