diff --git a/pyproject.toml b/pyproject.toml
index 8f1b71f..edc559e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "spleeter"
-version = "2.3.2"
+version = "2.3.3"
 description = "The Deezer source separation library with pretrained models based on tensorflow."
 authors = ["Deezer Research <spleeter@deezer.com>"]
 license = "MIT License"
diff --git a/spleeter/separator.py b/spleeter/separator.py
index 50e3984..f2925e8 100644
--- a/spleeter/separator.py
+++ b/spleeter/separator.py
@@ -304,7 +304,7 @@ class Separator(object):
 
     def separate(
         self, waveform: np.ndarray, audio_descriptor: Optional[str] = ""
-    ) -> None:
+    ) -> Dict:
         """
         Performs separation on a waveform.