diff --git a/CHANGELOG.md b/CHANGELOG.md
index c321ebe1..2397fc7d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,12 @@ Changes are grouped as follows
 - `Fixed` for any bug fixes.
 - `Security` in case of vulnerabilities.
 
+## [6.2.0]
+
+### Added
+
+ * Added `IOFileUploadQueue` as a base class of both `FileUploadQueue` and `BytesUploadQueue`.
+   This is an upload queue for functions that produce `BinaryIO` to CDF Files.
 
 ## [6.1.1]
 
diff --git a/cognite/extractorutils/__init__.py b/cognite/extractorutils/__init__.py
index 6020eb50..f9e8b7a1 100644
--- a/cognite/extractorutils/__init__.py
+++ b/cognite/extractorutils/__init__.py
@@ -16,5 +16,5 @@
 Cognite extractor utils is a Python package that simplifies the development of new extractors.
 """
 
-__version__ = "6.1.1"
+__version__ = "6.2.0"
 from .base import Extractor
diff --git a/cognite/extractorutils/uploader/files.py b/cognite/extractorutils/uploader/files.py
index 508d3218..ed615bf8 100644
--- a/cognite/extractorutils/uploader/files.py
+++ b/cognite/extractorutils/uploader/files.py
@@ -55,6 +55,10 @@ class IOFileUploadQueue(AbstractUploadQueue):
             methods).
         trigger_log_level: Log level to log upload triggers to.
         thread_name: Thread name of uploader thread.
+        max_parallelism: Maximum number of parallel uploads. If this is greater than 0,
+            the largest of this and client.config.max_workers is used to limit the number
+            of parallel uploads. This may be important if the IO objects being processed
+            also load data from an external system.
     """
 
     def __init__(
@@ -67,6 +71,7 @@ def __init__(
         thread_name: Optional[str] = None,
         overwrite_existing: bool = False,
         cancellation_token: threading.Event = threading.Event(),
+        max_parallelism: int = 0,
     ):
         # Super sets post_upload and threshold
         super().__init__(
@@ -82,6 +87,12 @@ def __init__(
         self.upload_queue: List[Tuple[FileMetadata, Union[str, Callable[[], BinaryIO]]]] = []
         self.overwrite_existing = overwrite_existing
 
+        self.parallelism = self.cdf_client.config.max_workers
+        if max_parallelism > 0 and max_parallelism < self.parallelism:
+            self.parallelism = max_parallelism
+        if self.parallelism <= 0:
+            self.parallelism = 4
+
         self.files_queued = FILES_UPLOADER_QUEUED
         self.files_written = FILES_UPLOADER_WRITTEN
         self.queue_size = FILES_UPLOADER_QUEUE_SIZE
@@ -160,7 +171,7 @@ def _upload_batch(self) -> None:
         # Concurrently execute file-uploads
 
         futures: List[Future] = []
-        with ThreadPoolExecutor(self.cdf_client.config.max_workers) as pool:
+        with ThreadPoolExecutor(self.parallelism) as pool:
             for i, (file_meta, file_name) in enumerate(self.upload_queue):
                 futures.append(pool.submit(self._upload_single, i, file_name, file_meta))
         for fut in futures:
diff --git a/pyproject.toml b/pyproject.toml
index 35117400..1879dc49 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cognite-extractor-utils"
-version = "6.1.1"
+version = "6.2.0"
 description = "Utilities for easier development of extractors for CDF"
 authors = ["Mathias Lohne <mathias.lohne@cognite.com>"]
 license = "Apache-2.0"