diff --git a/pyproject.toml b/pyproject.toml
index 82b1ff0..6683ca7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "s3-objects-tracker"
-version = "0.2.0"
+version = "0.3.0"
 description = "Track already processed objects inside your s3 bucket."
 authors = ["Vladimir Vyazovetskov <erhosen@gmail.com>"]
 license = "MIT"
diff --git a/s3_objects_tracker/__init__.py b/s3_objects_tracker/__init__.py
index 1f4a967..9ff2be2 100644
--- a/s3_objects_tracker/__init__.py
+++ b/s3_objects_tracker/__init__.py
@@ -1,5 +1,5 @@
 from s3_objects_tracker.tracker import S3ObjectsTracker
 
-__version__ = "0.2.0"
+__version__ = "0.3.0"
 
 __all__ = ("S3ObjectsTracker",)
diff --git a/s3_objects_tracker/tracker.py b/s3_objects_tracker/tracker.py
index 935ed8d..8904d3e 100644
--- a/s3_objects_tracker/tracker.py
+++ b/s3_objects_tracker/tracker.py
@@ -72,7 +72,7 @@ async def __aexit__(self, exc_type, exc_val, exc_tb) -> None:
         await self._upload_to_s3()
         await self._exit_stack.__aexit__(exc_type, exc_val, exc_tb)
 
-    async def determine_new(self, objects: List[T]) -> List[T]:
+    def determine_new(self, objects: List[T]) -> List[T]:
         new_objects = []
         for _object in objects:
             if _object.id not in self._published_ids:
diff --git a/tests/test_tracker.py b/tests/test_tracker.py
index 4a65171..2e533e9 100644
--- a/tests/test_tracker.py
+++ b/tests/test_tracker.py
@@ -25,7 +25,7 @@ async def test_common_workflow(object_storage_mock, s3_credentials):
     objects = [Object(i) for i in range(10)]
     async with S3ObjectsTracker(**s3_credentials) as tracker:
         assert tracker._published_ids == [], "Published IDs should be empty"
-        new_objects = await tracker.determine_new(objects)
+        new_objects = tracker.determine_new(objects)
         assert new_objects == objects, "New objects should be the same as objects"
         for _object in new_objects:
             await tracker.publish(_object)
@@ -35,7 +35,7 @@ async def test_common_workflow(object_storage_mock, s3_credentials):
         assert tracker._published_ids == [
             _object.id for _object in objects
         ], "First objects should be published"
-        new_objects = await tracker.determine_new(next_objects)
+        new_objects = tracker.determine_new(next_objects)
         assert new_objects == next_objects[5:], "Only last 5 objects should be new"
         for _object in new_objects:
             await tracker.publish(_object)
@@ -52,7 +52,7 @@ async def test_limit(object_storage_mock, s3_credentials):
     objects = [Object(i) for i in range(5)]
     async with S3ObjectsTracker(**s3_credentials, max_published_objects=5) as tracker:
         assert tracker._published_ids == [], "Published IDs should be empty"
-        new_objects = await tracker.determine_new(objects)
+        new_objects = tracker.determine_new(objects)
         assert new_objects == objects, "New objects should be the same as objects"
         for _object in objects:
             await tracker.publish(_object)
@@ -60,7 +60,7 @@ async def test_limit(object_storage_mock, s3_credentials):
     next_objects = [Object(i) for i in range(6)]
     async with S3ObjectsTracker(**s3_credentials, max_published_objects=5) as tracker:
         assert tracker._published_ids == [0, 1, 2, 3, 4], "Objects should be published"
-        new_objects = await tracker.determine_new(next_objects)
+        new_objects = tracker.determine_new(next_objects)
         assert new_objects == [Object(5)], "Only last _object should be new"
         await tracker.publish(new_objects[0])