diff --git a/requirements.txt b/requirements.txt
index 1cd49ce..57c2fbb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ Flask==2.0.2
 Jinja2==3.0.3
 markdown2==2.4.2
 paramiko==2.9.2
-protobuf==3.19.4
+protobuf==4.21.10
 Pygments==2.11.2
 pypuppetdb==2.5.1
 requests==2.25.1