diff --git a/tools/ci_build/github/linux/docker/scripts/requirements.txt b/tools/ci_build/github/linux/docker/scripts/requirements.txt
index cd2e15d3f2..8cec7ebf2a 100644
--- a/tools/ci_build/github/linux/docker/scripts/requirements.txt
+++ b/tools/ci_build/github/linux/docker/scripts/requirements.txt
@@ -8,3 +8,4 @@ git+http://github.com/onnx/onnx.git@be76ca7148396176784ba8733133b9fb1186ea0d#egg
 argparse
 sympy==1.1.1
 flatbuffers
+protobuf==3.18.1