diff --git a/version_3/requirements.txt b/version_3/requirements.txt
index ccb6c29..718921a 100644
--- a/version_3/requirements.txt
+++ b/version_3/requirements.txt
@@ -35,7 +35,7 @@ nose==1.3.7
 numpy==1.17.2
 oauth2client==3.0.0
 openapi-spec-validator==0.2.8
-protobuf==3.10.0rc1
+protobuf==3.15.0
 psycopg2==2.7.3
 pyasn1==0.4.7
 pyasn1-modules==0.2.6