diff --git a/datagen/requirements.txt b/datagen/requirements.txt
index 27697c1..6f1d891 100644
--- a/datagen/requirements.txt
+++ b/datagen/requirements.txt
@@ -13,7 +13,7 @@ googleapis-common-protos==1.6.0
 grpc-google-iam-v1==0.11.4
 grpcio==1.21.1
 idna==2.8
-protobuf==3.8.0
+protobuf==3.18.3
 pyasn1==0.4.5
 pyasn1-modules==0.2.5
 python-dateutil==2.8.0