diff --git a/onnx_import/requirements.txt b/onnx_import/requirements.txt
index 70d3897..f51ff05 100644
--- a/onnx_import/requirements.txt
+++ b/onnx_import/requirements.txt
@@ -2,7 +2,7 @@ Jinja2==2.10.1
 MarkupSafe==1.1.1
 numpy==1.16.3
 onnx==1.5.0
-protobuf==3.7.1
+protobuf==3.18.3
 six==1.14.0
 typing==3.7.4.1
 typing-extensions==3.7.4.1