diff --git a/requirements.txt b/requirements.txt
index d208e65..b9a1ca1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ Mako==1.1.2
 MarkupSafe==1.1.1
 msgpack==1.0.0
 mysqlclient==1.4.6
-protobuf==3.11.3
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 python-dateutil==2.8.1