diff --git a/requirements.txt b/requirements.txt
index 558db59..39781ea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 grpcio==1.24.1
 grpcio-tools==1.24.1
-protobuf==3.15.0
+protobuf==3.18.3
 six==1.12.0