diff --git a/setup.py b/setup.py
index 887b31f..6eea387 100644
--- a/setup.py
+++ b/setup.py
@@ -5,6 +5,6 @@
 setup(
     install_requires=[
         'target-core==0.1.0',
-        'boto3==1.26.20'
+        'boto3==1.26.82'
     ]
 )
diff --git a/src/target_s3_json/s3.py b/src/target_s3_json/s3.py
index 03946c9..423d33f 100644
--- a/src/target_s3_json/s3.py
+++ b/src/target_s3_json/s3.py
@@ -158,7 +158,7 @@ def upload_file(config: Dict[str, Any], file_metadata: Dict) -> None:
 async def upload_thread(config: Dict[str, Any], file_metadata: Dict) -> Future:
 
     return await to_thread(
-        config['executor'].submit,
+        *([config['executor'].submit] if config.get('thread_pool', True) else []),
         upload_file,
         config,
         file_metadata)