diff --git a/requirements.txt b/requirements.txt
index 70aeff0..649363c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ mysql-connector==2.2.9
 mysql-connector-python==8.0.19
 mysql-connector-python-rf==2.2.2
 mysqlclient==1.4.6
-protobuf==3.6.1
+protobuf==3.18.3
 six==1.14.0
 SQLAlchemy==1.3.13
 Werkzeug==0.16.1