diff --git a/requirements.txt b/requirements.txt
index bd3f4b7..f06209e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ itsdangerous==0.24
 Jinja2==2.10
 Markdown==2.6.11
 MarkupSafe==1.0
-protobuf==3.6.1
+protobuf==3.18.3
 PyYAML==3.13
 termcolor==1.1.0
 Werkzeug==0.14.1