diff --git a/packages/http/httpx/kiota_http/httpx_request_adapter.py b/packages/http/httpx/kiota_http/httpx_request_adapter.py
index d204ccc..8adadea 100644
--- a/packages/http/httpx/kiota_http/httpx_request_adapter.py
+++ b/packages/http/httpx/kiota_http/httpx_request_adapter.py
@@ -607,7 +607,7 @@ def get_request_from_request_information(
         }
 
         if url.port is not None:
-            otel_attributes["http.port"] = url.port
+            otel_attributes["http.port"] = str(url.port)
 
         if self.observability_options.include_euii_attributes:
             otel_attributes.update({URL_FULL: url.geturl()})