diff --git a/python/requirements.txt b/python/requirements.txt
index 8a95881..eab73a8 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -4,7 +4,7 @@ numpy>=1.11.0
 pytest>=3.2.2
 docopt
 pyyaml
-protobuf==3.5.2
+protobuf==3.18.3
 grpcio==1.11.0
 torch>=0.4.0
 pandas