diff --git a/sw360/components.py b/sw360/components.py
index debb676..d2f48d4 100644
--- a/sw360/components.py
+++ b/sw360/components.py
@@ -9,7 +9,8 @@
 # SPDX-License-Identifier: MIT
 # -------------------------------------------------------------------------------
 
-from typing import Any, Dict, List, Optional
+import sys
+from typing import Any, Dict, List, Optional, Union
 
 import requests
 
@@ -18,9 +19,11 @@
 
 
 class ComponentsMixin(BaseMixin):
+    # return type List[Dict[str, Any]] | Optional[Dict[str, Any]] for Python 3.11 is good,
+    # Union[List[Dict[str, Any]], Optional[Dict[str, Any]]] for lower Python versions is not good
     def get_all_components(self, fields=None, page=-1, page_size=-1,
                            all_details: bool = False,
-                           sort: str = "") -> List[Dict[str, Any]] | Optional[Dict[str, Any]]:
+                           sort: str = "") -> Any:
         """Get information of about all components
 
         API endpoint: GET /components
diff --git a/sw360/releases.py b/sw360/releases.py
index db7c83a..044d507 100644
--- a/sw360/releases.py
+++ b/sw360/releases.py
@@ -64,8 +64,10 @@ def get_releases_by_name(self, name: str) -> List[Any]:
 
         return []
 
+    # return type List[Dict[str, Any]] | Optional[Dict[str, Any]] for Python 3.11 is good,
+    # Union[List[Dict[str, Any]], Optional[Dict[str, Any]]] for lower Python versions is not good
     def get_all_releases(self, fields: str = "", all_details: bool = False, page: int = -1,
-                         page_size: int = -1, sort: str = "") -> List[Dict[str, Any]] | Optional[Dict[str, Any]]:
+                         page_size: int = -1, sort: str = "") -> Any:
         """Get information of about all releases
 
         API endpoint: GET /releases