diff --git a/requirements.txt b/requirements.txt
index 6c9d5a1..f2bbc64 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ Jinja2==2.11.1
 MarkupSafe==1.1.1
 mysql-connector==2.2.9
 mysql-connector-python==8.0.19
-protobuf==3.6.1
+protobuf==3.18.3
 python-dotenv==0.12.0
 six==1.14.0
 Werkzeug==1.0.0