diff --git a/jupyter/base/values/values.yaml b/jupyter/base/values/values.yaml
index dec3c6b..07ffa7b 100644
--- a/jupyter/base/values/values.yaml
+++ b/jupyter/base/values/values.yaml
@@ -21,7 +21,6 @@ hub:
         """
         import json
         import os
-        from urllib.parse import urlparse
 
         from tornado.httpserver import HTTPServer
         from tornado.ioloop import IOLoop
@@ -47,9 +46,9 @@ hub:
             )
 
             http_server = HTTPServer(app)
-            url = urlparse(f'http://{os.environ["PROXY_API_SERVICE_HOST"]}:{os.environ["PROXY_API_SERVICE_PORT"]}')
-
-            http_server.listen(url.port, url.hostname)
+            api_host = os.environ['PROXY_API_SERVICE_HOST']
+            api_port = os.environ['PROXY_API_SERVICE_PORT']
+            http_server.listen(api_port, api_host)
 
             IOLoop.current().start()
         if __name__ == '__main__':