diff --git a/requirements.txt b/requirements.txt
index 703d1f25..ee74da91 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ google-api-python-client==1.8.3
 google-auth<2.0dev,>=1.21.1
 httplib2>=0.15.0
 service_identity==17.0.0
-protobuf==3.15.8
+protobuf==3.20.1
 pyopenssl==17.5.0
 six==1.13.0
 click==7.1.2