diff --git a/requirements.txt b/requirements.txt
index 0dcdfb3..699bccc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ idna==2.9
 jmespath==0.10.0
 oauth2client==4.1.3
 oauthlib==3.1.0
-protobuf==3.11.3
+protobuf==3.15.0
 psycopg2-binary==2.8.5
 pyasn1==0.4.8
 pyasn1-modules==0.2.8