diff --git a/python/requirements.txt b/python/requirements.txt
index 5eef7c8..3cd6979 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -6,7 +6,7 @@ jupyter
 pytest>=3.2.2
 docopt
 pyyaml
-protobuf==3.5.2
+protobuf==3.18.3
 grpcio==1.11.0
 pandas
 scipy