diff --git a/training/pyproject.toml b/training/pyproject.toml
index e22f091..8b3639f 100644
--- a/training/pyproject.toml
+++ b/training/pyproject.toml
@@ -6,7 +6,7 @@ readme = "README.md"
 requires-python = ">=3.12"
 dependencies = [
     "numpy>=2.4.2",
-    "onnx>=1.20.1",
+    "onnx>=1.21.0",
     "onnxruntime>=1.24.1",
     "onnxscript>=0.6.2",
     "python-chess>=1.999",