diff --git a/pyproject.toml b/pyproject.toml
index e13b402..6cd812b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ medpy = "*"
 matplotlib = "*"
 holoviews = "*"
 seaborn = "*"
-onnx = "==1.16.1"
+onnx = "==1.21.0"
 onnxruntime = "*"
 
 [tool.poetry.group.dev.dependencies]