diff --git a/rocrate/model/data_entity.py b/rocrate/model/data_entity.py
index 4441875d..573f08a6 100644
--- a/rocrate/model/data_entity.py
+++ b/rocrate/model/data_entity.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-from typing import Generator
 
 # Copyright 2019-2024 The University of Manchester, UK
 # Copyright 2020-2024 Vlaams Instituut voor Biotechnologie (VIB), BE
@@ -30,7 +29,7 @@ class DataEntity(Entity):
     def write(self, base_path):
         pass
 
-    def stream(self, chunk_size=8192) -> Generator[tuple[str, bytes], None, None]:
+    def stream(self, chunk_size=8192):
         """ Stream the data from the source. Each chunk of the content is yielded as a tuple
         containing the name of the destination file relative to the crate and the chunk of data.
         The destination file name is required because a DataEntity can be a file or a
diff --git a/rocrate/model/dataset.py b/rocrate/model/dataset.py
index 0d047ddb..b2aaaf91 100644
--- a/rocrate/model/dataset.py
+++ b/rocrate/model/dataset.py
@@ -24,7 +24,6 @@
 import os
 import warnings
 from pathlib import Path
-from typing import Generator
 from urllib.request import urlopen
 
 from .file_or_dir import FileOrDir
@@ -82,7 +81,7 @@ def write(self, base_path):
         else:
             self._copy_folder(base_path)
 
-    def stream(self, chunk_size=8192) -> Generator[tuple[str, bytes], None, None]:
+    def stream(self, chunk_size=8192):
         if self.source is None:
             return
         elif is_url(str(self.source)):
diff --git a/rocrate/model/file.py b/rocrate/model/file.py
index 72b2c808..177c7f34 100644
--- a/rocrate/model/file.py
+++ b/rocrate/model/file.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+
 # Copyright 2019-2024 The University of Manchester, UK
 # Copyright 2020-2024 Vlaams Instituut voor Biotechnologie (VIB), BE
 # Copyright 2020-2024 Barcelona Supercomputing Center (BSC), ES
@@ -21,7 +22,6 @@
 
 from pathlib import Path
 import requests
-from typing import Generator
 
 import shutil
 import urllib.request
@@ -125,7 +125,7 @@ def _stream_from_file(self, path, chunk_size=8192):
         if self.record_size:
             self._jsonld['contentSize'] = str(size)
 
-    def stream(self, chunk_size=8192) -> Generator[tuple[str, bytes], None, None]:
+    def stream(self, chunk_size=8192):
         if isinstance(self.source, (BytesIO, StringIO)):
             yield from self._stream_from_stream(self.source)
         elif is_url(str(self.source)):
diff --git a/rocrate/model/metadata.py b/rocrate/model/metadata.py
index 2523a045..2703e8f0 100644
--- a/rocrate/model/metadata.py
+++ b/rocrate/model/metadata.py
@@ -22,7 +22,6 @@
 
 import json
 from pathlib import Path
-from typing import Generator
 
 from .file import File
 from .dataset import Dataset
@@ -75,7 +74,7 @@ def generate(self):
             context = context[0]
         return {'@context': context, '@graph': graph}
 
-    def stream(self, chunk_size=8192) -> Generator[tuple[str, bytes], None, None]:
+    def stream(self, chunk_size=8192):
         content = self.generate()
         yield self.id, str.encode(json.dumps(content, indent=4, sort_keys=True), encoding='utf-8')
 
diff --git a/rocrate/model/preview.py b/rocrate/model/preview.py
index da5d4866..9f4d6e97 100644
--- a/rocrate/model/preview.py
+++ b/rocrate/model/preview.py
@@ -22,7 +22,6 @@
 
 import os
 from pathlib import Path
-from typing import Generator
 
 from jinja2 import Template
 from .file import File
@@ -91,7 +90,7 @@ def is_object_list(a):
         out_html = src.render(crate=self.crate, context=context_entities, data=data_entities)
         return out_html
 
-    def stream(self, chunk_size=8192) -> Generator[tuple[str, bytes], None, None]:
+    def stream(self, chunk_size=8192):
         if self.source:
             yield from super().stream()
         else: