diff --git a/caffe2fluid/README.md b/caffe2fluid/README.md
index 10fca3b2c3a7d4c791ee76786a32b800d1b4be9f..a7252e0af173b0f5d9284442e4a61a4ee4ab71ea 100644
--- a/caffe2fluid/README.md
+++ b/caffe2fluid/README.md
@@ -7,7 +7,7 @@ caffe2fluid用于将Caffe模型转换为PaddlePaddle模型
 
 > python >= 2.7  
 > numpy  
-> protobuf  
+> protobuf >= 3.7.1  
 > future  
 
 **caffe2fluid的运行仅依赖上述条件**