diff --git a/onnxruntime/python/tools/transformers/models/stable_diffusion/requirements/requirements.txt b/onnxruntime/python/tools/transformers/models/stable_diffusion/requirements/requirements.txt
index e7852f7478db8..83e2b3005f4c4 100644
--- a/onnxruntime/python/tools/transformers/models/stable_diffusion/requirements/requirements.txt
+++ b/onnxruntime/python/tools/transformers/models/stable_diffusion/requirements/requirements.txt
@@ -3,7 +3,7 @@ diffusers==0.28.0
 transformers==4.50.0
 numpy>=1.24.1
 accelerate
-onnx==1.18.0
+onnx==1.21.0
 packaging
 # Use newer version of protobuf might cause crash
 protobuf==4.25.8