diff --git a/requirements.txt b/requirements.txt
index 5682661..94dadf7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 ## The following requirements were added by pip freeze:
 grpcio-tools==1.22.0
-protobuf==3.15.0
+protobuf==3.18.3
 six==1.12.0