diff --git a/src/model_converters/mxnet2onnx/requirements.txt b/src/model_converters/mxnet2onnx/requirements.txt
index 466f52de9..04f8e40ab 100644
--- a/src/model_converters/mxnet2onnx/requirements.txt
+++ b/src/model_converters/mxnet2onnx/requirements.txt
@@ -5,7 +5,7 @@ graphviz==0.8.4
 idna==3.6
 mxnet==1.9.1
 numpy==1.23.5
-onnx==1.14.1
+onnx==1.21.0
 protobuf==4.25.3
 requests==2.31.0
 typing_extensions==4.10.0