diff --git a/src/python/larynx_train/export_onnx.py b/src/python/larynx_train/export_onnx.py
index a556354..4ebff9b 100644
--- a/src/python/larynx_train/export_onnx.py
+++ b/src/python/larynx_train/export_onnx.py
@@ -10,7 +10,7 @@ from .vits.lightning import VitsModel
 
 _LOGGER = logging.getLogger("larynx_train.export_onnx")
 
-OPSET_VERSION = 16
+OPSET_VERSION = 15
 
 
 def main():