diff --git a/requirements.test.txt b/requirements.test.txt
index 74bc96d49..ec8d4bbda 100644
--- a/requirements.test.txt
+++ b/requirements.test.txt
@@ -10,7 +10,7 @@ numpy==1.21.0
 torch==1.9.0
 torchvision==0.10.0
 imageio==2.15.0
-protobuf==3.12.2
+protobuf==3.18.3
 kendryte-caffe
 pytest
 pytest-xdist