diff --git a/onnx_modules/V200/__init__.py b/onnx_modules/V200/__init__.py
index 33152ec..e90089f 100644
--- a/onnx_modules/V200/__init__.py
+++ b/onnx_modules/V200/__init__.py
@@ -1,2 +1,4 @@
 from .text.symbols import symbols
 from .models_onnx import SynthesizerTrn
+
+__all__ = ["symbols", "SynthesizerTrn"]
diff --git a/onnx_modules/V210/__init__.py b/onnx_modules/V210/__init__.py
index 33152ec..e90089f 100644
--- a/onnx_modules/V210/__init__.py
+++ b/onnx_modules/V210/__init__.py
@@ -1,2 +1,4 @@
 from .text.symbols import symbols
 from .models_onnx import SynthesizerTrn
+
+__all__ = ["symbols", "SynthesizerTrn"]
diff --git a/onnx_modules/V220/__init__.py b/onnx_modules/V220/__init__.py
index 33152ec..e90089f 100644
--- a/onnx_modules/V220/__init__.py
+++ b/onnx_modules/V220/__init__.py
@@ -1,2 +1,4 @@
 from .text.symbols import symbols
 from .models_onnx import SynthesizerTrn
+
+__all__ = ["symbols", "SynthesizerTrn"]