diff --git a/et_replay/.ci/docker/requirements-ci.txt b/et_replay/.ci/docker/requirements-ci.txt
index 2d5ef2fa..2ecd6596 100644
--- a/et_replay/.ci/docker/requirements-ci.txt
+++ b/et_replay/.ci/docker/requirements-ci.txt
@@ -347,7 +347,7 @@ sympy==1.13.3
 #Pinned versions:
 #test that import:
 
-onnx==1.18.0
+onnx==1.21.0rc1
 #Description: Required by onnx tests, and mypy and test_public_bindings.py
 #when checking torch.onnx._internal
 #Pinned versions: