diff --git a/requirements.txt b/requirements.txt
index f229aad..a674a5a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ Flask==2.0.2
 itsdangerous==2.0.1
 Jinja2==3.0.2
 MarkupSafe==2.0.1
-protobuf==3.18.1
+protobuf==3.18.3
 python-magic==0.4.24
 six==1.16.0
 Werkzeug==2.0.2