diff --git a/requirements.txt b/requirements.txt
index ea914ac..c7b9793 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,5 +3,5 @@ pyreadline==2.1
 urllib3==1.24.1
 setuptools==40.8.0
 httplib2shim==0.0.3
-protobuf==3.10.0
+protobuf==3.18.3
 google_api_python_client==1.7.11