diff --git a/requirements.txt b/requirements.txt
index 2cbcbef..ed988f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ numpy==1.19.0
 oauthlib==3.1.0
 onnx==1.7.0
 opt-einsum==3.2.1
-protobuf==3.12.2
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 PyYAML==5.3.1